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/*
* Copyright (c) 1997, 1999 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_l1fsm.c - isdn4bsd layer 1 I.430 state machine
* --------------------------------------------------
*
* $Id: i4b_l1fsm.c,v 1.28 1999/02/14 19:51:02 hm Exp $
*
* last edit-date: [Sun Feb 14 10:28:26 1999]
*
*---------------------------------------------------------------------------*/
#if defined(__FreeBSD__) || defined(__bsdi__)
#include "isic.h"
#else
#define NISIC 1
#endif
#if NISIC > 0
#include <sys/param.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#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
#ifndef __bsdi__
#include <machine/bus.h>
#endif
#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>
#else
#include <i4b/i4b_debug.h>
#include <i4b/i4b_ioctl.h>
#endif
#include <i4b/layer1/i4b_l1.h>
#include <i4b/layer1/i4b_isac.h>
#include <i4b/layer1/i4b_hscx.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_l1l2.h>
#include <i4b/include/i4b_mbuf.h>
static char *state_text[N_STATES] = {
"F3 Deactivated",
"F4 Awaiting Signal",
"F5 Identifying Input",
"F6 Synchronized",
"F7 Activated",
"F8 Lost Framing",
"Illegal State"
};
static char *event_text[N_EVENTS] = {
"EV_PHAR PH_ACT_REQ",
"EV_T3 Timer 3 expired",
"EV_INFO0 INFO0 received",
"EV_RSY Level Detected",
"EV_INFO2 INFO2 received",
"EV_INFO48 INFO4 received",
"EV_INFO410 INFO4 received",
"EV_DR Deactivate Req",
"EV_PU Power UP",
"EV_DIS Disconnected",
"EV_EI Error Ind",
"Illegal Event"
};
/* Function prototypes */
static void timer3_expired (struct isic_softc *sc);
static void T3_start (struct isic_softc *sc);
static void T3_stop (struct isic_softc *sc);
static void F_T3ex (struct isic_softc *sc);
static void timer4_expired (struct isic_softc *sc);
static void T4_start (struct isic_softc *sc);
static void T4_stop (struct isic_softc *sc);
static void F_AI8 (struct isic_softc *sc);
static void F_AI10 (struct isic_softc *sc);
static void F_I01 (struct isic_softc *sc);
static void F_I02 (struct isic_softc *sc);
static void F_I03 (struct isic_softc *sc);
static void F_I2 (struct isic_softc *sc);
static void F_ill (struct isic_softc *sc);
static void F_NULL (struct isic_softc *sc);
/*---------------------------------------------------------------------------*
* I.430 Timer T3 expire function
*---------------------------------------------------------------------------*/
static void
timer3_expired(struct isic_softc *sc)
{
if(sc->sc_I430T3)
{
DBGL1(L1_T_ERR, "timer3_expired", ("state = %s\n", isic_printstate(sc)));
sc->sc_I430T3 = 0;
/* XXX try some recovery here XXX */
isic_recover(sc);
sc->sc_init_tries++; /* increment retry count */
/*XXX*/ if(sc->sc_init_tries > 4)
{
int s = SPLI4B();
sc->sc_init_tries = 0;
if(sc->sc_obuf2 != NULL)
{
i4b_Dfreembuf(sc->sc_obuf2);
sc->sc_obuf2 = NULL;
}
if(sc->sc_obuf != NULL)
{
i4b_Dfreembuf(sc->sc_obuf);
sc->sc_obuf = NULL;
sc->sc_freeflag = 0;
sc->sc_op = NULL;
sc->sc_ol = 0;
}
splx(s);
MPH_Status_Ind(sc->sc_unit, STI_NOL1ACC, 0);
}
isic_next_state(sc, EV_T3);
}
else
{
DBGL1(L1_T_ERR, "timer3_expired", ("expired without starting it ....\n"));
}
}
/*---------------------------------------------------------------------------*
* I.430 Timer T3 start
*---------------------------------------------------------------------------*/
static void
T3_start(struct isic_softc *sc)
{
DBGL1(L1_T_MSG, "T3_start", ("state = %s\n", isic_printstate(sc)));
sc->sc_I430T3 = 1;
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
sc->sc_T3_callout = timeout((TIMEOUT_FUNC_T)timer3_expired,(struct isic_softc *)sc, 2*hz);
#else
timeout((TIMEOUT_FUNC_T)timer3_expired,(struct isic_softc *)sc, 2*hz);
#endif
}
/*---------------------------------------------------------------------------*
* I.430 Timer T3 stop
*---------------------------------------------------------------------------*/
static void
T3_stop(struct isic_softc *sc)
{
DBGL1(L1_T_MSG, "T3_stop", ("state = %s\n", isic_printstate(sc)));
sc->sc_init_tries = 0; /* init connect retry count */
if(sc->sc_I430T3)
{
sc->sc_I430T3 = 0;
#if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
untimeout((TIMEOUT_FUNC_T)timer3_expired,(struct isic_softc *)sc, sc->sc_T3_callout);
#else
untimeout((TIMEOUT_FUNC_T)timer3_expired,(struct isic_softc *)sc);
#endif
}
}
/*---------------------------------------------------------------------------*
* I.430 Timer T3 expiry
*---------------------------------------------------------------------------*/
static void
F_T3ex(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_T3ex", ("FSM function F_T3ex executing\n"));
PH_Deact_Ind(sc->sc_unit);
}
/*---------------------------------------------------------------------------*
* Timer T4 expire function
*---------------------------------------------------------------------------*/
static void
timer4_expired(struct isic_softc *sc)
{
if(sc->sc_I430T4)
{
DBGL1(L1_T_ERR, "timer4_expired", ("state = %s\n", isic_printstate(sc)));
sc->sc_I430T4 = 0;
MPH_Status_Ind(sc->sc_unit, STI_PDEACT, 0);
}
else
{
DBGL1(L1_T_ERR, "timer4_expired", ("expired without starting it ....\n"));
}
}
/*---------------------------------------------------------------------------*
* Timer T4 start
*---------------------------------------------------------------------------*/
static void
T4_start(struct isic_softc *sc)
{
DBGL1(L1_T_MSG, "T4_start", ("state = %s\n", isic_printstate(sc)));
sc->sc_I430T4 = 1;
#if defined(__FreeBSD__) && __FreeBSD__ >=3
sc->sc_T4_callout = timeout((TIMEOUT_FUNC_T)timer4_expired,(struct isic_softc *)sc, hz);
#else
timeout((TIMEOUT_FUNC_T)timer4_expired,(struct isic_softc *)sc, hz);
#endif
}
/*---------------------------------------------------------------------------*
* Timer T4 stop
*---------------------------------------------------------------------------*/
static void
T4_stop(struct isic_softc *sc)
{
DBGL1(L1_T_MSG, "T4_stop", ("state = %s\n", isic_printstate(sc)));
if(sc->sc_I430T4)
{
sc->sc_I430T4 = 0;
#if defined(__FreeBSD__) && __FreeBSD__ >=3
untimeout((TIMEOUT_FUNC_T)timer4_expired,(struct isic_softc *)sc, sc->sc_T4_callout);
#else
untimeout((TIMEOUT_FUNC_T)timer4_expired,(struct isic_softc *)sc);
#endif
}
}
/*---------------------------------------------------------------------------*
* FSM function: received AI8
*---------------------------------------------------------------------------*/
static void
F_AI8(struct isic_softc *sc)
{
T4_stop(sc);
DBGL1(L1_F_MSG, "F_AI8", ("FSM function F_AI8 executing\n"));
PH_Act_Ind(sc->sc_unit);
T3_stop(sc);
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO4_8;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_NT;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
}
/*---------------------------------------------------------------------------*
* FSM function: received AI10
*---------------------------------------------------------------------------*/
static void
F_AI10(struct isic_softc *sc)
{
T4_stop(sc);
DBGL1(L1_F_MSG, "F_AI10", ("FSM function F_AI10 executing\n"));
PH_Act_Ind(sc->sc_unit);
T3_stop(sc);
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO4_10;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_NT;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
}
/*---------------------------------------------------------------------------*
* FSM function: received INFO 0 in states F3 .. F5
*---------------------------------------------------------------------------*/
static void
F_I01(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_I01", ("FSM function F_I01 executing\n"));
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO0;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_NT;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
}
/*---------------------------------------------------------------------------*
* FSM function: received INFO 0 in state F6
*---------------------------------------------------------------------------*/
static void
F_I02(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_I02", ("FSM function F_I02 executing\n"));
PH_Deact_Ind(sc->sc_unit);
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO0;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_NT;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
}
/*---------------------------------------------------------------------------*
* FSM function: received INFO 0 in state F7 or F8
*---------------------------------------------------------------------------*/
static void
F_I03(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_I03", ("FSM function F_I03 executing\n"));
PH_Deact_Ind(sc->sc_unit);
T4_start(sc);
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO0;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_NT;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
}
/*---------------------------------------------------------------------------*
* FSM function: activate request
*---------------------------------------------------------------------------*/
static void
F_AR(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_AR", ("FSM function F_AR executing\n"));
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO1_8;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_TE;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
isic_isac_l1_cmd(sc, CMD_AR8);
T3_start(sc);
}
/*---------------------------------------------------------------------------*
* FSM function: received INFO2
*---------------------------------------------------------------------------*/
static void
F_I2(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_I2", ("FSM function F_I2 executing\n"));
if(sc->sc_trace & TRACE_I)
{
i4b_trace_hdr_t hdr;
char info = INFO2;
hdr.unit = sc->sc_unit;
hdr.type = TRC_CH_I;
hdr.dir = FROM_NT;
hdr.count = 0;
MICROTIME(hdr.time);
MPH_Trace_Ind(&hdr, 1, &info);
}
}
/*---------------------------------------------------------------------------*
* illegal state default action
*---------------------------------------------------------------------------*/
static void
F_ill(struct isic_softc *sc)
{
DBGL1(L1_F_ERR, "F_ill", ("FSM function F_ill executing\n"));
}
/*---------------------------------------------------------------------------*
* No action
*---------------------------------------------------------------------------*/
static void
F_NULL(struct isic_softc *sc)
{
DBGL1(L1_F_MSG, "F_NULL", ("FSM function F_NULL executing\n"));
}
/*---------------------------------------------------------------------------*
* layer 1 state transition table
*---------------------------------------------------------------------------*/
struct isic_state_tab {
void (*func) (struct isic_softc *sc); /* function to execute */
int newstate; /* next state */
} isic_state_tab[N_EVENTS][N_STATES] = {
/* STATE: F3 F4 F5 F6 F7 F8 ILLEGAL STATE */
/* -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
/* EV_PHAR x*/ {{F_AR, ST_F4}, {F_NULL, ST_F4}, {F_NULL, ST_F5}, {F_NULL, ST_F6}, {F_ill, ST_ILL}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
/* EV_T3 x*/ {{F_NULL, ST_F3}, {F_T3ex, ST_F3}, {F_T3ex, ST_F3}, {F_T3ex, ST_F3}, {F_NULL, ST_F7}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
/* EV_INFO0 */ {{F_I01, ST_F3}, {F_I01, ST_F4}, {F_I01, ST_F5}, {F_I02, ST_F3}, {F_I03, ST_F3}, {F_I03, ST_F3}, {F_ill, ST_ILL}},
/* EV_RSY x*/ {{F_NULL, ST_F3}, {F_NULL, ST_F5}, {F_NULL, ST_F5}, {F_NULL, ST_F8}, {F_NULL, ST_F8}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
/* EV_INFO2 */ {{F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_I2, ST_F6}, {F_ill, ST_ILL}},
/* EV_INFO48*/ {{F_AI8, ST_F7}, {F_AI8, ST_F7}, {F_AI8, ST_F7}, {F_AI8, ST_F7}, {F_NULL, ST_F7}, {F_AI8, ST_F7}, {F_ill, ST_ILL}},
/* EV_INFO41*/ {{F_AI10, ST_F7}, {F_AI10, ST_F7}, {F_AI10, ST_F7}, {F_AI10, ST_F7}, {F_NULL, ST_F7}, {F_AI10, ST_F7}, {F_ill, ST_ILL}},
/* EV_DR */ {{F_NULL, ST_F3}, {F_NULL, ST_F4}, {F_NULL, ST_F5}, {F_NULL, ST_F6}, {F_NULL, ST_F7}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
/* EV_PU */ {{F_NULL, ST_F3}, {F_NULL, ST_F4}, {F_NULL, ST_F5}, {F_NULL, ST_F6}, {F_NULL, ST_F7}, {F_NULL, ST_F8}, {F_ill, ST_ILL}},
/* EV_DIS */ {{F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}},
/* EV_EI */ {{F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_NULL, ST_F3}, {F_ill, ST_ILL}},
/* EV_ILL */ {{F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}, {F_ill, ST_ILL}}
};
/*---------------------------------------------------------------------------*
* event handler
*---------------------------------------------------------------------------*/
void
isic_next_state(struct isic_softc *sc, int event)
{
int currstate, newstate;
if(event >= N_EVENTS)
panic("i4b_l1fsm.c: event >= N_EVENTS\n");
currstate = sc->sc_I430state;
if(currstate >= N_STATES)
panic("i4b_l1fsm.c: currstate >= N_STATES\n");
newstate = isic_state_tab[event][currstate].newstate;
if(newstate >= N_STATES)
panic("i4b_l1fsm.c: newstate >= N_STATES\n");
DBGL1(L1_F_MSG, "isic_next_state", ("FSM event [%s]: [%s => %s]\n", event_text[event],
state_text[currstate],
state_text[newstate]));
(*isic_state_tab[event][currstate].func)(sc);
if(newstate == ST_ILL)
{
newstate = ST_F3;
DBGL1(L1_F_ERR, "isic_next_state", ("FSM Illegal State ERROR, oldstate = %s, newstate = %s, event = %s!\n",
state_text[currstate],
state_text[newstate],
event_text[event]));
}
sc->sc_I430state = newstate;
}
/*---------------------------------------------------------------------------*
* return pointer to current state description
*---------------------------------------------------------------------------*/
char *
isic_printstate(struct isic_softc *sc)
{
return((char *) state_text[sc->sc_I430state]);
}
#endif /* NISIC > 0 */
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