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freebsd-nq/sys/i4b/layer1/i4b_l1.c
Poul-Henning Kamp 19c749625f Initial entry of ISDN4BSD into the FreeBSD tree. 
ISDN4BSD is the work of our brand-new comitter: Hellmuth Michaelis,
who has done a tremendous amount of work to bring us this far.

There are still some outstanding issues and files to bring into
the tree, and for now it will be needed to pick up all the extra
docs from the isdn4bsd release.

It is probably also a very good idea to subscribe to the isdn@freebsd.org
mailing list before you try this out.

These files correspond to release "beta Version 0.70.00 / December
1998" from Hellmuth.
1998-12-27 21:47:14 +00:00

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/*
* Copyright (c) 1997, 1998 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_l1.c - isdn4bsd layer 1 handler
* -----------------------------------
*
* $Id: i4b_l1.c,v 1.27 1998/12/05 18:04:51 hm Exp $
*
* last edit-date: [Sat Dec 5 18:24:52 1998]
*
*---------------------------------------------------------------------------*/
#ifdef __FreeBSD__
#include "isic.h"
#else
#define NISIC 1 /* don't bother */
#endif
#if NISIC > 0
#include <sys/param.h>
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
#include <sys/ioccom.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <machine/stdarg.h>
#ifdef __FreeBSD__
#include <machine/clock.h>
#include <i386/isa/isa_device.h>
#else
#include <machine/bus.h>
#include <sys/device.h>
#endif
#include <sys/socket.h>
#include <net/if.h>
#ifdef __FreeBSD__
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_trace.h>
#else
#include <i4b/i4b_debug.h>
#include <i4b/i4b_ioctl.h>
#include <i4b/i4b_trace.h>
#endif
#include <i4b/layer1/i4b_l1.h>
#include <i4b/layer1/i4b_isac.h>
#include <i4b/layer1/i4b_hscx.h>
#include <i4b/include/i4b_l1l2.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_global.h>
unsigned int i4b_l1_debug = L1_DEBUG_DEFAULT;
static int ph_data_req(int, struct mbuf *, int);
static int ph_activate_req(int);
/* from i4btrc driver i4b_trace.c */
extern int get_trace_data_from_l1(int unit, int what, int len, char *buf);
/* from layer 2 */
extern int i4b_ph_data_ind(int unit, struct mbuf *m);
extern int i4b_ph_activate_ind(int unit);
extern int i4b_ph_deactivate_ind(int unit);
extern int i4b_mph_attach_ind(int unit);
extern int i4b_mph_status_ind(int, int, int);
/* layer 1 lme */
static int i4b_mph_command_req(int, int, int);
/* jump table */
struct i4b_l1l2_func i4b_l1l2_func = {
/* Layer 1 --> Layer 2 */
(int (*)(int, struct mbuf *)) i4b_ph_data_ind,
(int (*)(int)) i4b_ph_activate_ind,
(int (*)(int)) i4b_ph_deactivate_ind,
/* Layer 2 --> Layer 1 */
(int (*)(int, struct mbuf *, int)) ph_data_req,
(int (*)(int)) ph_activate_req,
/* Layer 1 --> upstream, ISDN trace data */
(int (*)(i4b_trace_hdr_t *, int, u_char *)) get_trace_data_from_l1,
/* Driver control and status information */
(int (*)(int, int, int)) i4b_mph_status_ind,
(int (*)(int, int, int)) i4b_mph_command_req,
};
/*---------------------------------------------------------------------------*
*
* L2 -> L1: PH-DATA-REQUEST
* =========================
*
* parms:
* unit physical interface unit number
* m mbuf containing L2 frame to be sent out
* freeflag MBUF_FREE: free mbuf here after having sent
* it out
* MBUF_DONTFREE: mbuf is freed by Layer 2
* returns:
* ==0 fail, nothing sent out
* !=0 ok, frame sent out
*
*---------------------------------------------------------------------------*/
static int
ph_data_req(int unit, struct mbuf *m, int freeflag)
{
u_char cmd;
int s;
#ifdef __FreeBSD__
struct isic_softc *sc = &isic_sc[unit];
#else
struct isic_softc *sc = isic_find_sc(unit);
#endif
#ifdef NOTDEF
DBGL1(L1_PRIM, "PH-DATA-REQ", ("unit %d, freeflag=%d\n", unit, freeflag));
#endif
if(m == NULL) /* failsafe */
return (0);
s = SPLI4B();
if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */
{
DBGL1(L1_I_ERR, "ph_data_req", ("still in state F3!\n"));
ph_activate_req(unit);
}
if(sc->sc_state & ISAC_TX_ACTIVE)
{
if(sc->sc_obuf2 == NULL)
{
sc->sc_obuf2 = m; /* save mbuf ptr */
if(freeflag)
sc->sc_freeflag2 = 1; /* IRQ must mfree */
else
sc->sc_freeflag2 = 0; /* IRQ must not mfree */
DBGL1(L1_I_MSG, "ph_data_req", ("using 2nd ISAC TX buffer, state = %s\n", isic_printstate(sc)));
if(sc->sc_trace & TRACE_D_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = unit;
hdr.type = TRC_CH_D;
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_dcount;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, m->m_len, m->m_data);
}
splx(s);
return(1);
}
DBGL1(L1_I_ERR, "ph_data_req", ("No Space in TX FIFO, state = %s\n", isic_printstate(sc)));
if(freeflag == MBUF_FREE)
i4b_Dfreembuf(m);
splx(s);
return (0);
}
if(sc->sc_trace & TRACE_D_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = unit;
hdr.type = TRC_CH_D;
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_dcount;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, m->m_len, m->m_data);
}
sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
DBGL1(L1_I_MSG, "ph_data_req", ("ISAC_TX_ACTIVE set\n"));
sc->sc_freeflag = 0; /* IRQ must NOT mfree */
ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
if(m->m_len > ISAC_FIFO_LEN) /* message > 32 bytes ? */
{
sc->sc_obuf = m; /* save mbuf ptr */
sc->sc_op = m->m_data + ISAC_FIFO_LEN; /* ptr for irq hdl */
sc->sc_ol = m->m_len - ISAC_FIFO_LEN; /* length for irq hdl */
if(freeflag)
sc->sc_freeflag = 1; /* IRQ must mfree */
cmd = ISAC_CMDR_XTF;
}
else
{
sc->sc_obuf = NULL;
sc->sc_op = NULL;
sc->sc_ol = 0;
if(freeflag)
i4b_Dfreembuf(m);
cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
}
ISAC_WRITE(I_CMDR, cmd);
ISACCMDRWRDELAY();
splx(s);
return(1);
}
/*---------------------------------------------------------------------------*
*
* L2 -> L1: PH-ACTIVATE-REQUEST
* =============================
*
* parms:
* unit physical interface unit number
*
* returns:
* ==0
* !=0
*
*---------------------------------------------------------------------------*/
static int
ph_activate_req(int unit)
{
#ifdef __FreeBSD__
struct isic_softc *sc = &isic_sc[unit];
#else
struct isic_softc *sc = isic_find_sc(unit);
#endif
DBGL1(L1_PRIM, "PH-ACTIVATE-REQ", ("unit %d\n", unit));
isic_next_state(sc, EV_PHAR);
return(0);
}
/*---------------------------------------------------------------------------*
* command from the upper layers
*---------------------------------------------------------------------------*/
static int
i4b_mph_command_req(int unit, int command, int parm)
{
#ifdef __FreeBSD__
struct isic_softc *sc = &isic_sc[unit];
#else
struct isic_softc *sc = isic_find_sc(unit);
#endif
switch(command)
{
case CMR_DOPEN: /* daemon running */
DBGL1(L1_PRIM, "MPH-COMMAND-REQ", ("unit %d, command = CMR_DOPEN\n", unit));
sc->sc_enabled = 1;
break;
case CMR_DCLOSE: /* daemon not running */
DBGL1(L1_PRIM, "MPH-COMMAND-REQ", ("unit %d, command = CMR_DCLOSE\n", unit));
sc->sc_enabled = 0;
break;
default:
DBGL1(L1_ERROR, "i4b_mph_command_req", ("ERROR, unknown command = %d, unit = %d, parm = %d\n", command, unit, parm));
break;
}
return(0);
}
#endif /* NISIC > 0 */
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