mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
322 lines
6.1 KiB
Bash
322 lines
6.1 KiB
Bash
#!/bin/sh
|
|
# This writes a skeleton driver and puts it into the kernel tree for you
|
|
#arg1 is lowercase "foo"
|
|
#
|
|
# Trust me, RUN THIS SCRIPT :)
|
|
#
|
|
#-------cut here------------------
|
|
cd /sys/i386/conf
|
|
|
|
if [ "${1}X" = "X" ]
|
|
then
|
|
echo "Hey , how about some help here.. give me a device name!"
|
|
exit 1
|
|
fi
|
|
|
|
UPPER=`echo ${1} |tr "[:lower:]" "[:upper:]"`
|
|
cat >files.${UPPER} <<DONE
|
|
dev/${1}.c optional ${1} device-driver
|
|
DONE
|
|
|
|
cat >${UPPER} <<DONE
|
|
# Configuration file for kernel type: ${UPPER}
|
|
ident ${UPPER}
|
|
# \$FreeBSD$"
|
|
DONE
|
|
|
|
grep -v GENERIC < GENERIC >>${UPPER}
|
|
|
|
cat >>${UPPER} <<DONE
|
|
# trust me, you'll need this
|
|
options DDB
|
|
device ${1} 4 # might as well allow 4 of them
|
|
DONE
|
|
|
|
cat >../../dev/${1}.c <<DONE
|
|
/*
|
|
* Copyright ME
|
|
*
|
|
* ${1} driver
|
|
* \$FreeBSD$
|
|
*/
|
|
|
|
|
|
#include "${1}.h" /* generated file.. defines N${UPPER} */
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h> /* SYSINIT stuff */
|
|
#include <sys/conf.h> /* cdevsw stuff */
|
|
#include <sys/malloc.h> /* malloc region definitions */
|
|
#include <machine/clock.h> /* DELAY() */
|
|
#include <sys/${1}io.h> /* ${1} IOCTL definitions */
|
|
#ifdef DEVFS
|
|
#include <sys/devfsext.h> /* DEVFS defintitions */
|
|
#endif /* DEVFS */
|
|
|
|
|
|
|
|
/* Function prototypes (these should all be static) */
|
|
static d_open_t ${1}open;
|
|
static d_close_t ${1}close;
|
|
static d_read_t ${1}read;
|
|
static d_write_t ${1}write;
|
|
static d_ioctl_t ${1}ioctl;
|
|
static d_mmap_t ${1}mmap;
|
|
static d_poll_t ${1}poll;
|
|
|
|
#define CDEV_MAJOR 20
|
|
static struct cdevsw ${1}_cdevsw = {
|
|
${1}open,
|
|
${1}close,
|
|
${1}read,
|
|
${1}write,
|
|
${1}ioctl,
|
|
nullstop,
|
|
nullreset,
|
|
nodevtotty,
|
|
${1}poll,
|
|
${1}mmap,
|
|
NULL,
|
|
"${1}",
|
|
NULL,
|
|
-1 };
|
|
|
|
/*
|
|
* device specific Misc defines
|
|
*/
|
|
#define BUFFERSIZE 1024
|
|
#define UNIT(dev) minor(dev) /* assume one minor number per unit */
|
|
|
|
/*
|
|
* One of these per allocated device
|
|
*/
|
|
struct ${1}_softc {
|
|
struct isa_device *dev;
|
|
char buffer[BUFFERSIZE];
|
|
#ifdef DEVFS
|
|
static void *devfs_token;
|
|
#endif
|
|
} ;
|
|
|
|
typedef struct ${1}_softc *sc_p;
|
|
|
|
static sc_p sca[N${UPPER}];
|
|
|
|
/*
|
|
* Macro to check that the unit number is valid
|
|
* Often this isn't needed as once the open() is performed,
|
|
* the unit number is pretty much safe.. The exception would be if we
|
|
* implemented devices that could "go away". in which case all these routines
|
|
* would be wise to check the number, DIAGNOSTIC or not.
|
|
*/
|
|
#define CHECKUNIT(RETVAL) \
|
|
do { /* the do-while is a safe way to do this grouping */ \
|
|
if (unit > N${UPPER}) { \
|
|
printf(__FUNCTION__ ":bad unit %d\n", unit); \
|
|
return (RETVAL); \
|
|
} \
|
|
if (scp == NULL) { \
|
|
printf( __FUNCTION__ ": unit %d not attached\n", unit);\
|
|
return (RETVAL); \
|
|
} \
|
|
} while (0)
|
|
#ifdef DIAGNOSTIC
|
|
#define CHECKUNIT_DIAG(RETVAL) CHECKUNIT(RETVAL)
|
|
#else /* DIAGNOSTIC */
|
|
#define CHECKUNIT_DIAG(RETVAL)
|
|
#endif /* DIAGNOSTIC */
|
|
|
|
int ${1}ioctl (dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
|
|
CHECKUNIT_DIAG(ENXIO);
|
|
|
|
switch (cmd) {
|
|
case DHIOCRESET:
|
|
/* whatever resets it */
|
|
outb(scp->dev->id_iobase, 0xff);
|
|
break;
|
|
default:
|
|
return ENXIO;
|
|
}
|
|
return (0);
|
|
}
|
|
/*
|
|
* You also need read, write, open, close routines.
|
|
* This should get you started
|
|
*/
|
|
static int
|
|
${1}open(dev_t dev, int oflags, int devtype, struct proc *p)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
|
|
CHECKUNIT(ENXIO);
|
|
|
|
/*
|
|
* Do processing
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
${1}close(dev_t dev, int fflag, int devtype, struct proc *p)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
|
|
CHECKUNIT_DIAG(ENXIO);
|
|
|
|
/*
|
|
* Do processing
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
${1}read(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
int toread;
|
|
|
|
|
|
CHECKUNIT_DIAG(ENXIO);
|
|
|
|
/*
|
|
* Do processing
|
|
* read from buffer
|
|
*/
|
|
toread = (min(uio->uio_resid, sizeof(scp->buffer)));
|
|
return(uiomove(scp->buffer, toread, uio));
|
|
}
|
|
|
|
static int
|
|
${1}write(dev_t dev, struct uio *uio, int ioflag)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
int towrite;
|
|
|
|
CHECKUNIT_DIAG(ENXIO);
|
|
|
|
/*
|
|
* Do processing
|
|
* write to buffer
|
|
*/
|
|
towrite = (min(uio->uio_resid, sizeof(scp->buffer)));
|
|
return(uiomove(scp->buffer, towrite, uio));
|
|
}
|
|
|
|
static int
|
|
${1}mmap(dev_t dev, int offset, int nprot)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
|
|
CHECKUNIT_DIAG(-1);
|
|
|
|
/*
|
|
* Do processing
|
|
*/
|
|
#if 0 /* if we had a frame buffer or whatever.. do this */
|
|
if (offset > FRAMEBUFFERSIZE - PAGE_SIZE) {
|
|
return (-1);
|
|
}
|
|
return i386_btop((FRAMEBASE + offset));
|
|
#else
|
|
return (-1);
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
${1}poll(dev_t dev, int which, struct proc *p)
|
|
{
|
|
int unit = UNIT (dev);
|
|
sc_p scp = sca[unit];
|
|
|
|
CHECKUNIT_DIAG(ENXIO);
|
|
|
|
/*
|
|
* Do processing
|
|
*/
|
|
return (0); /* this is the wrong value I'm sure */
|
|
}
|
|
|
|
/*
|
|
* Now for some driver initialisation.
|
|
* Occurs ONCE during boot (very early).
|
|
*/
|
|
static void
|
|
${1}_drvinit(void *unused)
|
|
{
|
|
dev_t dev;
|
|
int unit;
|
|
sc_p scp = sca[unit];
|
|
|
|
dev = makedev(CDEV_MAJOR, 0);
|
|
cdevsw_add(&dev, &${1}_cdevsw, NULL);
|
|
for (unit = 0; unit < N${UPPER}; unit++) {
|
|
/*
|
|
* Allocate storage for this instance .
|
|
*/
|
|
scp = malloc(sizeof(*scp), M_DEVBUF, M_NOWAIT);
|
|
if( scp == NULL) {
|
|
printf("${1}%d failed to allocate strorage\n", unit);
|
|
return ;
|
|
}
|
|
bzero(scp, sizeof(*scp));
|
|
sca[unit] = scp;
|
|
#if DEVFS
|
|
scp->devfs_token = devfs_add_devswf(&${1}_cdevsw, unit, DV_CHR,
|
|
UID_ROOT, GID_KMEM, 0640, "${1}%d", unit);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
SYSINIT(${1}dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+CDEV_MAJOR,
|
|
${1}_drvinit, NULL)
|
|
|
|
|
|
DONE
|
|
|
|
cat >../../sys/${1}io.h <<DONE
|
|
/*
|
|
* Definitions needed to access the ${1} device (ioctls etc)
|
|
* see mtio.h , ioctl.h as examples
|
|
*/
|
|
#ifndef SYS_DHIO_H
|
|
#define SYS_DHIO_H
|
|
|
|
#ifndef KERNEL
|
|
#include <sys/types.h>
|
|
#endif
|
|
#include <sys/ioccom.h>
|
|
|
|
/*
|
|
* define an ioctl here
|
|
*/
|
|
#define DHIOCRESET _IO('D', 0) /* reset the ${1} device */
|
|
#endif
|
|
DONE
|
|
|
|
config ${UPPER}
|
|
cd ../../compile/${UPPER}
|
|
make depend
|
|
make ${1}.o
|
|
make
|
|
exit
|
|
|
|
#--------------end of script---------------
|
|
#
|
|
#you also need to add an entry into the cdevsw[]
|
|
#array in conf.c, but it's too hard to do in a script..
|
|
#
|
|
#edit to your taste..
|
|
#
|
|
#
|
|
|
|
|