00b4430eb8
Because I'm planning on MFC'ing my last change to this file, make sure we use dev2unit() here as well.
444 lines
9.3 KiB
Bash
444 lines
9.3 KiB
Bash
#!/bin/sh
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# This writes a skeleton driver and puts it into the kernel tree for you
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#
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# arg1 is lowercase "foo"
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# arg2 path to the kernel sources, "/sys" if omitted
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#
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# Trust me, RUN THIS SCRIPT :)
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#
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# $FreeBSD$
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#
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#-------cut here------------------
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if [ "${1}X" = "X" ]
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then
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echo "Hey , how about some help here.. give me a device name!"
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exit 1
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fi
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if [ "X${2}" = "X" ]; then
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TOP=`cd /sys; pwd -P`
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echo "Using ${TOP} as the path to the kernel sources!"
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else
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TOP=${2}
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fi
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for i in "" "conf" "i386" "i386/conf" "dev" "sys" "modules"
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do
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if [ -d ${TOP}/${i} ]
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then
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continue
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fi
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echo "${TOP}/${i}: no such directory."
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echo "Please, correct the error and try again."
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exit 1
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done
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UPPER=`echo ${1} |tr "[:lower:]" "[:upper:]"`
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if [ -d ${TOP}/modules/${1} ]; then
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echo "There appears to already be a module called ${1}"
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echo -n "Should it be overwritten? [Y]"
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read VAL
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if [ "-z" "$VAL" ]; then
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VAL=YES
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fi
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case ${VAL} in
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[yY]*)
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echo "Cleaning up from prior runs"
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rm -rf ${TOP}/dev/${1}
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rm -rf ${TOP}/modules/${1}
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rm ${TOP}/conf/files.${UPPER}
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rm ${TOP}/i386/conf/${UPPER}
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rm ${TOP}/sys/${1}io.h
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;;
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*)
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exit 1
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;;
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esac
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fi
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echo "The following files will be created:"
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echo ${TOP}/modules/${1}
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echo ${TOP}/conf/files.${UPPER}
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echo ${TOP}/i386/conf/${UPPER}
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echo ${TOP}/dev/${1}
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echo ${TOP}/dev/${1}/${1}.c
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echo ${TOP}/sys/${1}io.h
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echo ${TOP}/modules/${1}
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echo ${TOP}/modules/${1}/Makefile
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mkdir ${TOP}/modules/${1}
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cat >${TOP}/conf/files.${UPPER} <<DONE
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dev/${1}/${1}.c optional ${1}
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DONE
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cat >${TOP}/i386/conf/${UPPER} <<DONE
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# Configuration file for kernel type: ${UPPER}
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# \$FreeBSD\$
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files "${TOP}/conf/files.${UPPER}"
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include GENERIC
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ident ${UPPER}
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# trust me, you'll need this
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options KDB
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options DDB
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device ${1}
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DONE
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if [ ! -d ${TOP}/dev/${1} ]; then
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mkdir -p ${TOP}/dev/${1}
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fi
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cat >${TOP}/dev/${1}/${1}.c <<DONE
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/*
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* Copyright (c) [year] [your name]
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* ${1} driver
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*/
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#include <sys/cdefs.h>
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__FBSDID("\$FreeBSD\$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h> /* SYSINIT stuff */
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#include <sys/uio.h> /* SYSINIT stuff */
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#include <sys/conf.h> /* cdevsw stuff */
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#include <sys/malloc.h> /* malloc region definitions */
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#include <sys/proc.h>
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#include <sys/${1}io.h> /* ${1} IOCTL definitions */
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#include <machine/clock.h> /* DELAY() */
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#define N${UPPER} 3 /* defines number of instances */
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/* XXX These should be defined in terms of bus-space ops. */
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#define ${UPPER}_INB(port) inb(port)
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#define ${UPPER}_OUTB(port, val) (port, (val))
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/* Function prototypes (these should all be static) */
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static d_open_t ${1}open;
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static d_close_t ${1}close;
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static d_read_t ${1}read;
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static d_write_t ${1}write;
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static d_ioctl_t ${1}ioctl;
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static d_mmap_t ${1}mmap;
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static d_poll_t ${1}poll;
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#define CDEV_MAJOR 20
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static struct cdevsw ${1}_cdevsw = {
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.d_version = D_VERSION,
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.d_open = ${1}open,
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.d_close = ${1}close,
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.d_read = ${1}read,
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.d_write = ${1}write,
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.d_ioctl = ${1}ioctl,
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.d_poll = ${1}poll,
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.d_mmap = ${1}mmap,
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.d_name = "${1}",
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};
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/*
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* device specific Misc defines
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*/
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#define BUFFERSIZE 1024
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#define UNIT(dev) dev2unit(dev) /* assume one minor number per unit */
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/*
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* One of these per allocated device
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*/
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struct ${1}_softc {
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u_long iobase;
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char buffer[BUFFERSIZE];
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struct cdev *dev;
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};
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typedef struct ${1}_softc *sc_p;
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static sc_p sca[N${UPPER}];
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/*
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* Macro to check that the unit number is valid
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* Often this isn't needed as once the open() is performed,
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* the unit number is pretty much safe.. The exception would be if we
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* implemented devices that could "go away". in which case all these routines
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* would be wise to check the number, DIAGNOSTIC or not.
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*/
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#define CHECKUNIT(RETVAL) \
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do { /* the do-while is a safe way to do this grouping */ \
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if (unit > N${UPPER}) { \
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printf("%s: bad unit %d\n", __func__, unit); \
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return (RETVAL); \
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} \
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if (scp == NULL) { \
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printf("%s: unit %d not attached\n", __func__, unit); \
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return (RETVAL); \
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} \
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} while (0)
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#ifdef DIAGNOSTIC
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#define CHECKUNIT_DIAG(RETVAL) CHECKUNIT(RETVAL)
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#else /* DIAGNOSTIC */
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#define CHECKUNIT_DIAG(RETVAL)
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#endif /* DIAGNOSTIC */
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static int
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${1}ioctl (struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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CHECKUNIT_DIAG(ENXIO);
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switch (cmd) {
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case DHIOCRESET:
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/* whatever resets it */
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(void)scp; /* Delete this line after using scp. */
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#if 0
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${UPPER}_OUTB(scp->iobase, 0xff);
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#endif
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break;
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default:
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return ENXIO;
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}
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return (0);
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}
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/*
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* You also need read, write, open, close routines.
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* This should get you started
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*/
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static int
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${1}open(struct cdev *dev, int oflags, int devtype, struct thread *td)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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CHECKUNIT(ENXIO);
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(void)scp; /* Delete this line after using scp. */
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/*
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* Do processing
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*/
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return (0);
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}
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static int
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${1}close(struct cdev *dev, int fflag, int devtype, struct thread *td)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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CHECKUNIT_DIAG(ENXIO);
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(void)scp; /* Delete this line after using scp. */
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/*
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* Do processing
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*/
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return (0);
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}
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static int
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${1}read(struct cdev *dev, struct uio *uio, int ioflag)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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int toread;
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CHECKUNIT_DIAG(ENXIO);
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/*
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* Do processing
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* read from buffer
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*/
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toread = (min(uio->uio_resid, sizeof(scp->buffer)));
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return(uiomove(scp->buffer, toread, uio));
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}
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static int
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${1}write(struct cdev *dev, struct uio *uio, int ioflag)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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int towrite;
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CHECKUNIT_DIAG(ENXIO);
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/*
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* Do processing
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* write to buffer
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*/
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towrite = (min(uio->uio_resid, sizeof(scp->buffer)));
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return(uiomove(scp->buffer, towrite, uio));
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}
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static int
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${1}mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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CHECKUNIT_DIAG(-1);
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(void)scp; /* Delete this line after using scp. */
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/*
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* Do processing
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*/
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#if 0 /* if we had a frame buffer or whatever.. do this */
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if (offset > FRAMEBUFFERSIZE - PAGE_SIZE) {
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return (-1);
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}
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return i386_btop((FRAMEBASE + offset));
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#else
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return (-1);
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#endif
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}
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static int
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${1}poll(struct cdev *dev, int which, struct thread *td)
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{
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int unit = UNIT(dev);
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sc_p scp = sca[unit];
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CHECKUNIT_DIAG(ENXIO);
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(void)scp; /* Delete this line after using scp. */
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/*
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* Do processing
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*/
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return (0); /* this is the wrong value I'm sure */
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}
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/*
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* Now for some driver initialisation.
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* Occurs ONCE during boot (very early).
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*/
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static void
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${1}_drvinit(void *unused)
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{
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int unit;
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sc_p scp;
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for (unit = 0; unit < N${UPPER}; unit++) {
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/*
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* Allocate storage for this instance .
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*/
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scp = malloc(sizeof(*scp), M_DEVBUF, M_NOWAIT | M_ZERO);
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if( scp == NULL) {
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printf("${1}%d failed to allocate strorage\n", unit);
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return;
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}
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sca[unit] = scp;
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scp->dev = make_dev(&${1}_cdevsw, unit,
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UID_ROOT, GID_KMEM, 0640, "${1}%d", unit);
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}
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}
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SYSINIT(${1}dev, SI_SUB_DRIVERS, SI_ORDER_MIDDLE+CDEV_MAJOR,
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${1}_drvinit, NULL);
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DONE
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cat >${TOP}/sys/${1}io.h <<DONE
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/*
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* Definitions needed to access the ${1} device (ioctls etc)
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* see mtio.h , ioctl.h as examples
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*/
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#ifndef SYS_DHIO_H
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#define SYS_DHIO_H
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#ifndef KERNEL
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#include <sys/types.h>
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#endif
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#include <sys/ioccom.h>
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/*
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* define an ioctl here
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*/
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#define DHIOCRESET _IO('D', 0) /* reset the ${1} device */
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#endif
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DONE
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if [ ! -d ${TOP}/modules/${1} ]; then
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mkdir -p ${TOP}/modules/${1}
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fi
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cat >${TOP}/modules/${1}/Makefile <<DONE
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# ${UPPER} Loadable Kernel Module
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#
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# \$FreeBSD\$
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.PATH: \${.CURDIR}/../../dev/${1}
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KMOD = ${1}
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SRCS = ${1}.c
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.include <bsd.kmod.mk>
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DONE
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echo -n "Do you want to build the '${1}' module? [Y]"
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read VAL
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if [ "-z" "$VAL" ]; then
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VAL=YES
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fi
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case ${VAL} in
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[yY]*)
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(cd ${TOP}/modules/${1}; make depend; make )
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;;
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*)
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# exit
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;;
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esac
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echo ""
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echo -n "Do you want to build the '${UPPER}' kernel? [Y]"
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read VAL
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if [ "-z" "$VAL" ]; then
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VAL=YES
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fi
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case ${VAL} in
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[yY]*)
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(
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cd ${TOP}/i386/conf; \
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config ${UPPER}; \
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cd ${TOP}/i386/compile/${UPPER}; \
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make depend; \
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make; \
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)
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;;
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*)
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# exit
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;;
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esac
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#--------------end of script---------------
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#
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#edit to your taste..
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#
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#
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