freebsd-dev/sys/dev/pccard/pccard_device.c
Warner Losh 209161a4f6 Don't confuse the tuple code and the tuple length. Ooops. Since most
CIS are tiny, this likely hasn't bit anybody yet...
2005-09-21 20:08:24 +00:00

174 lines
4.4 KiB
C

/*-
* Copyright (c) 2005, M. Warner Losh
* 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 unmodified, 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/pccard/pccardreg.h>
#include <dev/pccard/pccardvar.h>
#include <dev/pccard/pccardvarp.h>
#include <dev/pccard/pccard_cis.h>
static d_open_t pccard_open;
static d_close_t pccard_close;
static d_read_t pccard_read;
static d_ioctl_t pccard_ioctl;
static struct cdevsw pccard_cdevsw = {
.d_version = D_VERSION,
.d_open = pccard_open,
.d_close = pccard_close,
.d_read = pccard_read,
.d_ioctl = pccard_ioctl,
.d_name = "pccard"
};
int
pccard_device_create(struct pccard_softc *sc)
{
uint32_t minor;
minor = device_get_unit(sc->dev) << 16;
sc->cisdev = make_dev(&pccard_cdevsw, minor, 0, 0, 0666,
"pccard%u.cis", device_get_unit(sc->dev));
sc->cisdev->si_drv1 = sc;
return (0);
}
int
pccard_device_destroy(struct pccard_softc *sc)
{
if (sc->cisdev)
destroy_dev(sc->cisdev);
return (0);
}
static int
pccard_build_cis(const struct pccard_tuple *tuple, void *argp)
{
struct cis_buffer *cis;
int i;
uint8_t ch;
cis = (struct cis_buffer *)argp;
/*
* CISTPL_END is a special case, it has no length field.
*/
if (tuple->code == CISTPL_END) {
if (cis->len + 1 > sizeof(cis->buffer))
return (ENOSPC);
cis->buffer[cis->len++] = tuple->code;
return (0);
}
if (cis->len + 2 + tuple->length > sizeof(cis->buffer))
return (ENOSPC);
cis->buffer[cis->len++] = tuple->code;
cis->buffer[cis->len++] = tuple->length;
for (i = 0; i < tuple->length; i++) {
ch = pccard_tuple_read_1(tuple, i);
cis->buffer[cis->len++] = ch;
}
return (0);
}
static int
pccard_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
device_t parent, child;
device_t *kids;
int cnt, err;
struct pccard_softc *sc;
sc = dev->si_drv1;
if (sc->cis_open)
return (EBUSY);
parent = sc->dev;
err = device_get_children(parent, &kids, &cnt);
if (err)
return err;
if (cnt == 0) {
free(kids, M_TEMP);
sc->cis_open++;
sc->cis = NULL;
return (0);
}
child = kids[0];
free(kids, M_TEMP);
sc->cis = malloc(sizeof(*sc->cis), M_TEMP, M_ZERO | M_WAITOK);
err = pccard_scan_cis(parent, child, pccard_build_cis, sc->cis);
if (err) {
free(sc->cis, M_TEMP);
sc->cis = NULL;
return (err);
}
sc->cis_open++;
return (0);
}
static int
pccard_close(struct cdev *dev, int fflags, int devtype, struct thread *td)
{
struct pccard_softc *sc;
sc = dev->si_drv1;
free(sc->cis, M_TEMP);
sc->cis = NULL;
sc->cis_open = 0;
return (0);
}
static int
pccard_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
struct thread *td)
{
return (ENOTTY);
}
static int
pccard_read(struct cdev *dev, struct uio *uio, int ioflag)
{
struct pccard_softc *sc;
sc = dev->si_drv1;
/* EOF */
if (sc->cis == NULL || uio->uio_offset > sc->cis->len)
return (0);
return (uiomove(sc->cis->buffer + uio->uio_offset,
MIN(uio->uio_resid, sc->cis->len - uio->uio_offset), uio));
}