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/*
* Loadable kernel module skeleton driver
* 11 July 1995 Andrew McRae
*
*-------------------------------------------------------------------------
*
* Copyright (c) 1995 Andrew McRae. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/sysent.h>
#include <sys/exec.h>
#include <sys/lkm.h>
#include <pccard/card.h>
#include <pccard/slot.h>
/*
* This defines the lkm_misc module use by modload
* to define the module name.
*/
MOD_MISC( "skel")
static int skelintr(struct pccard_dev *); /* Interrupt handler */
static void skelunload(struct pccard_dev *); /* Disable driver */
static void skelsuspend(struct pccard_dev *); /* Suspend driver */
static int skelinit(struct pccard_dev *, int); /* init device */
static struct pccard_drv skel_info =
{
"skel",
skelintr,
skelunload,
skelsuspend,
skelinit,
};
static int opened; /* Rather minimal device state... */
/*
* Module handler that processes loads and unloads.
* Once the module is loaded, the add driver routine is called
* to register the driver.
* If an unload is requested the remove driver routine is
* called to deregister the driver before unloading.
*/
static int
skel_handle( lkmtp, cmd)
struct lkm_table *lkmtp;
int cmd;
{
int i;
struct lkm_misc *args = lkmtp->private.lkm_misc;
int err = 0; /* default = success*/
switch( cmd) {
case LKM_E_LOAD:
/*
* Don't load twice! (lkmexists() is exported by kern_lkm.c)
*/
if( lkmexists( lkmtp))
return( EEXIST);
/*
* Now register the driver
*/
pccard_add_driver(&skel_info);
break; /* Success*/
/*
* Attempt to deregister the driver.
*/
case LKM_E_UNLOAD:
pccard_remove_driver(&skel_info);
break; /* Success*/
default: /* we only understand load/unload*/
err = EINVAL;
break;
}
return( err);
}
/*
* External entry point; should generally match name of .o file. The
* arguments are always the same for all loaded modules. The "load",
* "unload", and "stat" functions in "DISPATCH" will be called under
* their respective circumstances unless their value is "nosys". If
* called, they are called with the same arguments (cmd is included to
* allow the use of a single function, ver is included for version
* matching between modules and the kernel loader for the modules).
*
* Since we expect to link in the kernel and add external symbols to
* the kernel symbol name space in a future version, generally all
* functions used in the implementation of a particular module should
* be static unless they are expected to be seen in other modules or
* to resolve unresolved symbols alread existing in the kernel (the
* second case is not likely to ever occur).
*
* The entry point should return 0 unless it is refusing load (in which
* case it should return an errno from errno.h).
*/
int
lkm_skel(lkmtp, cmd, ver)
struct lkm_table *lkmtp;
int cmd;
int ver;
{
DISPATCH(lkmtp,cmd,ver,skel_handle,skel_handle,nosys)
}
/*
* Skeleton driver entry points for PCCARD configuration.
*/
/*
* The device entry is being removed. Shut it down,
* and turn off interrupts etc. Not called unless
* the device was successfully installed.
*/
static void
skelunload(struct pccard_dev *dp)
{
printf("skel%d: unload\n", dp->unit);
opened &= ~(1 << dp->unit);
}
/*
* Called when a power down is wanted. Shuts down the
* device and configures the device as unavailable (but
* still loaded...). A resume is done by calling
* skelinit with first=0.
*/
static void
skelsuspend(struct pccard_dev *dp)
{
printf("skel%d: suspending\n", dp->unit);
}
/*
* Initialize the device.
* if first is set, then initially check for
* the device's existence before initialising it.
* Once initialised, the device table may be set up.
*/
static int
skelinit(struct pccard_dev *dp, int first)
{
if (first && ((1 << dp->unit)&opened))
return(EBUSY);
if (first)
opened |= 1 << dp->unit;
printf("skel%d: init, first = %d\n", dp->unit, first);
printf("iomem = 0x%x, iobase = 0x%x\n", dp->memory, dp->ioaddr);
return(0);
}
/*
* Interrupt handler.
* Returns true if the interrupt is for us.
*/
static int
skelintr(struct pccard_dev *dp)
{
return(0);
}
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