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NetBSD/sys/netisdn/i4b_ctl.c
martin 5171d409a5 First step to cleanup the hardware driver <-> upper layers interface. 
This now provides slightly more functionality than the FreeBSD layer1-newbus
interface. It was meant to be a simple change to one header and a few
c files, but the change rippled all through various stuff.

To prevent a change to the kernel<->userland interface right now the kernel
is now lying about card types to userland (but who cares). This will be fixed
when the userland interface changes, after layer 3 <-> layer 4 has been
fixed.

Functional changes:

Provide a clean interface for hardware drivers to attach to the upper
layers. This will need another small change in the B-channel handling
when a similar change to the layer 3 <-> layer 4 interface happens.

Avoid passing indices into global arrays of pointers around, instead pass
the pointers itself. Don't code hardware driver types by predefined magic
numbers (think LKM). Prepare for detachable drivers (think pcmcia).

While there remove some sets of function pointers always pointing to the
same function (meant to be the configurable set of D channel protocol
handlers). It is unlikely another supported D-channel protocol will fit into
that (maximal layer interface) abstraction. When we get support for another
protocol, we will need to come up with a workable interface. Besides, the
old implementation was, uhm, strange.
2001-03-24 12:40:29 +00:00

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/*
* Copyright (c) 1997, 2000 Hellmuth Michaelis. 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.
*
* 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.
*
*---------------------------------------------------------------------------
*
* i4b_ctl.c - i4b system control port driver
* ------------------------------------------
*
* $Id: i4b_ctl.c,v 1.2 2001/03/24 12:40:31 martin Exp $
*
* $FreeBSD$
*
* last edit-date: [Fri Jan 5 11:33:46 2001]
*
*---------------------------------------------------------------------------*/
#include "i4bctl.h"
#if NI4BCTL > 1
#error "only 1 (one) i4bctl device allowed!"
#endif
#if NI4BCTL > 0
#include <sys/param.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <sys/ioccom.h>
#include <i386/isa/isa_device.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <net/if.h>
#ifdef __FreeBSD__
#if defined(__FreeBSD__) && __FreeBSD__ == 3
#include "opt_devfs.h"
#endif
#ifdef DEVFS
#include <sys/devfsext.h>
#endif
#endif /* __FreeBSD__ */
#ifdef __FreeBSD__
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#elif defined(__bsdi__)
#include <i4b/i4b_debug.h>
#include <i4b/i4b_ioctl.h>
#else
#include <machine/bus.h>
#include <sys/device.h>
#include <netisdn/i4b_debug.h>
#include <netisdn/i4b_ioctl.h>
#endif
#include <netisdn/i4b_global.h>
#include <netisdn/i4b_mbuf.h>
#include <netisdn/i4b_l3l4.h>
#include <netisdn/i4b_l1l2.h>
#include <netisdn/i4b_l2.h>
static int openflag = 0;
#if BSD > 199306 && defined(__FreeBSD__)
static d_open_t i4bctlopen;
static d_close_t i4bctlclose;
static d_ioctl_t i4bctlioctl;
#ifdef OS_USES_POLL
static d_poll_t i4bctlpoll;
#define POLLFIELD i4bctlpoll
#else
#define POLLFIELD noselect
#endif
#define CDEV_MAJOR 55
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
static struct cdevsw i4bctl_cdevsw = {
/* open */ i4bctlopen,
/* close */ i4bctlclose,
/* read */ noread,
/* write */ nowrite,
/* ioctl */ i4bctlioctl,
/* poll */ POLLFIELD,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "i4bctl",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* bmaj */ -1
};
#else
static struct cdevsw i4bctl_cdevsw =
{ i4bctlopen, i4bctlclose, noread, nowrite,
i4bctlioctl, nostop, nullreset, nodevtotty,
POLLFIELD, nommap, NULL, "i4bctl", NULL, -1 };
#endif
static void i4bctlattach(void *);
PSEUDO_SET(i4bctlattach, i4b_i4bctldrv);
#define PDEVSTATIC static
#endif /* __FreeBSD__ */
#if defined(__FreeBSD__) && __FreeBSD__ == 3
#ifdef DEVFS
static void *devfs_token;
#endif
#endif
#ifndef __FreeBSD__
#define PDEVSTATIC /* */
void i4bctlattach __P((void));
int i4bctlopen __P((dev_t dev, int flag, int fmt, struct proc *p));
int i4bctlclose __P((dev_t dev, int flag, int fmt, struct proc *p));
#ifdef __bsdi__
int i4bctlioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p));
#else
int i4bctlioctl __P((dev_t dev, int cmd, caddr_t data, int flag, struct proc *p));
#endif
#endif /* !FreeBSD */
#if BSD > 199306 && defined(__FreeBSD__)
/*---------------------------------------------------------------------------*
* initialization at kernel load time
*---------------------------------------------------------------------------*/
static void
i4bctlinit(void *unused)
{
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
cdevsw_add(&i4bctl_cdevsw);
#else
dev_t dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev, &i4bctl_cdevsw, NULL);
#endif
}
SYSINIT(i4bctldev, SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR, &i4bctlinit, NULL);
#endif /* BSD > 199306 && defined(__FreeBSD__) */
#ifdef __bsdi__
int i4bctlmatch(struct device *parent, struct cfdata *cf, void *aux);
void dummy_i4bctlattach(struct device*, struct device *, void *);
#define CDEV_MAJOR 64
static struct cfdriver i4bctlcd =
{ NULL, "i4bctl", i4bctlmatch, dummy_i4bctlattach, DV_DULL,
sizeof(struct cfdriver) };
struct devsw i4bctlsw =
{ &i4bctlcd,
i4bctlopen, i4bctlclose, noread, nowrite,
i4bctlioctl, seltrue, nommap, nostrat,
nodump, nopsize, 0, nostop
};
int
i4bctlmatch(struct device *parent, struct cfdata *cf, void *aux)
{
printf("i4bctlmatch: aux=0x%x\n", aux);
return 1;
}
void
dummy_i4bctlattach(struct device *parent, struct device *self, void *aux)
{
printf("dummy_i4bctlattach: aux=0x%x\n", aux);
}
#endif /* __bsdi__ */
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
PDEVSTATIC void
#ifdef __FreeBSD__
i4bctlattach(void *dummy)
#else
i4bctlattach()
#endif
{
#ifndef HACK_NO_PSEUDO_ATTACH_MSG
printf("i4bctl: ISDN system control port attached\n");
#endif
#if defined(__FreeBSD__)
#if __FreeBSD__ == 3
#ifdef DEVFS
devfs_token = devfs_add_devswf(&i4bctl_cdevsw, 0, DV_CHR,
UID_ROOT, GID_WHEEL, 0600,
"i4bctl");
#endif
#else
make_dev(&i4bctl_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "i4bctl");
#endif
#endif
}
/*---------------------------------------------------------------------------*
* i4bctlopen - device driver open routine
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4bctlopen(dev_t dev, int flag, int fmt, struct proc *p)
{
if(minor(dev))
return (ENXIO);
if(openflag)
return (EBUSY);
openflag = 1;
return (0);
}
/*---------------------------------------------------------------------------*
* i4bctlclose - device driver close routine
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4bctlclose(dev_t dev, int flag, int fmt, struct proc *p)
{
openflag = 0;
return (0);
}
/*---------------------------------------------------------------------------*
* i4bctlioctl - device driver ioctl routine
*---------------------------------------------------------------------------*/
PDEVSTATIC int
#if defined (__FreeBSD_version) && __FreeBSD_version >= 300003
i4bctlioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#elif defined(__bsdi__)
i4bctlioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#else
i4bctlioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
#endif
{
#if DO_I4B_DEBUG
ctl_debug_t *cdbg;
int error = 0;
#endif
#if !DO_I4B_DEBUG
return(ENODEV);
#else
if(minor(dev))
return(ENODEV);
switch(cmd)
{
case I4B_CTL_GET_DEBUG:
cdbg = (ctl_debug_t *)data;
cdbg->l1 = i4b_l1_debug;
cdbg->l2 = i4b_l2_debug;
cdbg->l3 = i4b_l3_debug;
cdbg->l4 = i4b_l4_debug;
break;
case I4B_CTL_SET_DEBUG:
cdbg = (ctl_debug_t *)data;
i4b_l1_debug = cdbg->l1;
i4b_l2_debug = cdbg->l2;
i4b_l3_debug = cdbg->l3;
i4b_l4_debug = cdbg->l4;
break;
case I4B_CTL_GET_CHIPSTAT:
{
struct chipstat *cst;
l2_softc_t * scl2;
cst = (struct chipstat *)data;
scl2 = (l2_softc_t*)isdn_find_l2_by_bri(cst->driver_unit);
scl2->driver->n_mgmt_command(scl2->l1_token, CMR_GCST, cst);
break;
}
case I4B_CTL_CLR_CHIPSTAT:
{
struct chipstat *cst;
l2_softc_t * scl2;
cst = (struct chipstat *)data;
scl2 = (l2_softc_t*)isdn_find_l2_by_bri(cst->driver_unit);
scl2->driver->n_mgmt_command(scl2->l1_token, CMR_CCST, cst);
break;
}
case I4B_CTL_GET_LAPDSTAT:
{
l2stat_t *l2s;
l2_softc_t *sc;
l2s = (l2stat_t *)data;
sc = (l2_softc_t*)isdn_find_l2_by_bri(l2s->unit);
if (sc == NULL) {
error = EINVAL;
break;
}
bcopy(&sc->stat, &l2s->lapdstat, sizeof(lapdstat_t));
break;
}
case I4B_CTL_CLR_LAPDSTAT:
{
int *up;
l2_softc_t *sc;
up = (int *)data;
sc = (l2_softc_t*)isdn_find_l2_by_bri(*up);
if (sc == NULL) {
error = EINVAL;
break;
}
bzero(&sc->stat, sizeof(lapdstat_t));
break;
}
default:
error = ENOTTY;
break;
}
return(error);
#endif DO_I4B_DEBUG
}
#if defined(__FreeBSD__) && defined(OS_USES_POLL)
/*---------------------------------------------------------------------------*
* i4bctlpoll - device driver poll routine
*---------------------------------------------------------------------------*/
static int
i4bctlpoll (dev_t dev, int events, struct proc *p)
{
return (ENODEV);
}
#endif
#endif /* NI4BCTL > 0 */
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