180 lines
5.3 KiB
C
180 lines
5.3 KiB
C
/*
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* Loadable kernel module skeleton driver
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* 11 July 1995 Andrew McRae
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*
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*-------------------------------------------------------------------------
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*
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* Copyright (c) 1995 Andrew McRae. 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/proc.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/sysent.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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#include <i386/isa/isa_device.h>
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#include <sys/select.h>
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#include <sys/kernel.h>
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#include <pccard/cardinfo.h>
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#include <pccard/driver.h>
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#include <pccard/slot.h>
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/*
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* This defines the lkm_misc module use by modload
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* to define the module name.
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*/
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MOD_MISC(skel);
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static int skelinit(struct pccard_devinfo *); /* init device */
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static void skelunload(struct pccard_devinfo *); /* Disable driver */
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static int skelintr(struct pccard_devinfo *); /* Interrupt handler */
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static struct pccard_device skel_info = {
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"skel",
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skelinit,
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skelunload,
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skelintr,
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0, /* Attributes - presently unused */
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&net_imask /* Interrupt mask for device */
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};
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DATA_SET(pccarddrv_set, skel_info);
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static int opened; /* Rather minimal device state... */
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/*
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* Module handler that processes loads and unloads.
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* Once the module is loaded, the add driver routine is called
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* to register the driver.
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* If an unload is requested the remove driver routine is
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* called to deregister the driver before unloading.
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*/
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static int
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skel_handle(lkmtp, cmd)
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struct lkm_table *lkmtp;
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int cmd;
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{
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int i;
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struct lkm_misc *args = lkmtp->private.lkm_misc;
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int err = 0; /* default = success*/
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switch( cmd) {
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case LKM_E_LOAD:
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/*
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* Now register the driver
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*/
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pccard_add_driver(&skel_info);
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break; /* Success*/
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/*
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* Attempt to deregister the driver.
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*/
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case LKM_E_UNLOAD:
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pccard_remove_driver(&skel_info);
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break; /* Success*/
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default: /* we only understand load/unload*/
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err = EINVAL;
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break;
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}
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return( err);
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}
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/*
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* External entry point; should generally match name of .o file. The
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* arguments are always the same for all loaded modules. The "load",
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* "unload", and "stat" functions in "MOD_DISPATCH" will be called under
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* their respective circumstances unless their value is "nosys". If
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* called, they are called with the same arguments (cmd is included to
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* allow the use of a single function, ver is included for version
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* matching between modules and the kernel loader for the modules).
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*
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* Since we expect to link in the kernel and add external symbols to
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* the kernel symbol name space in a future version, generally all
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* functions used in the implementation of a particular module should
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* be static unless they are expected to be seen in other modules or
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* to resolve unresolved symbols alread existing in the kernel (the
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* second case is not likely to ever occur).
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*
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* The entry point should return 0 unless it is refusing load (in which
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* case it should return an errno from errno.h).
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*/
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int
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skel(lkmtp, cmd, ver)
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struct lkm_table *lkmtp;
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int cmd;
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int ver;
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{
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MOD_DISPATCH(skel,lkmtp,cmd,ver,skel_handle,skel_handle,nosys)
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}
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/*
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* Skeleton driver entry points for PCCARD configuration.
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*/
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/*
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* Initialize the device.
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*/
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static int
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skelinit(struct pccard_devinfo *devi)
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{
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int unit = devi->isahd.id_unit;
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if (opened & (1 << unit))
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return(EBUSY);
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opened |= 1 << unit;
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printf("%s%d: init\n", devi->drv->name, unit);
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printf("%s%d: irq %d iobase 0x%x maddr 0x%x memlen %d\n",
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devi->drv->name, unit, devi->isahd.id_irq,
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devi->isahd.id_iobase, devi->isahd.id_maddr,
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devi->isahd.id_msize);
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return(0);
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}
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/*
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* The device entry is being removed. Shut it down,
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* and turn off interrupts etc. Not called unless
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* the device was successfully installed.
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*/
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static void
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skelunload(struct pccard_devinfo *devi)
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{
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int unit = devi->isahd.id_unit;
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printf("%s%d: unload\n", devi->drv->name, unit);
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opened &= ~(1 << unit);
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}
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/*
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* Interrupt handler.
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* Returns true if the interrupt is for us.
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*/
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static int
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skelintr(struct pccard_devinfo *devi)
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{
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return(0);
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}
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