isdnl1.c

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/* $Id: isdnl1.c,v 2.46.2.5 2004/02/11 13:21:34 keil Exp $
 *
 * common low level stuff for Siemens Chipsetbased isdn cards
 *
 * Author       Karsten Keil
 *              based on the teles driver from Jan den Ouden
 * Copyright    by Karsten Keil      <[email protected]>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * For changes and modifications please read
 * Documentation/isdn/HiSax.cert
 *
 * Thanks to    Jan den Ouden
 *              Fritz Elfert
 *              Beat Doebeli
 *
 */

#include <linux/init.h>
#include <linux/gfp.h>
#include "hisax.h"
#include "isdnl1.h"

const char *l1_revision = "$Revision: 2.46.2.5 $";

#define TIMER3_VALUE 7000

static struct Fsm l1fsm_b;
static struct Fsm l1fsm_s;

enum {
    ST_L1_F2,
    ST_L1_F3,
    ST_L1_F4,
    ST_L1_F5,
    ST_L1_F6,
    ST_L1_F7,
    ST_L1_F8,
};

#define L1S_STATE_COUNT (ST_L1_F8 + 1)

static char *strL1SState[] =
{
    "ST_L1_F2",
    "ST_L1_F3",
    "ST_L1_F4",
    "ST_L1_F5",
    "ST_L1_F6",
    "ST_L1_F7",
    "ST_L1_F8",
};

#ifdef HISAX_UINTERFACE
static
struct Fsm l1fsm_u =
{NULL, 0, 0, NULL, NULL};

enum {
    ST_L1_RESET,
    ST_L1_DEACT,
    ST_L1_SYNC2,
    ST_L1_TRANS,
};

#define L1U_STATE_COUNT (ST_L1_TRANS + 1)

static char *strL1UState[] =
{
    "ST_L1_RESET",
    "ST_L1_DEACT",
    "ST_L1_SYNC2",
    "ST_L1_TRANS",
};
#endif

enum {
    ST_L1_NULL,
    ST_L1_WAIT_ACT,
    ST_L1_WAIT_DEACT,
    ST_L1_ACTIV,
};

#define L1B_STATE_COUNT (ST_L1_ACTIV + 1)

static char *strL1BState[] =
{
    "ST_L1_NULL",
    "ST_L1_WAIT_ACT",
    "ST_L1_WAIT_DEACT",
    "ST_L1_ACTIV",
};

enum {
    EV_PH_ACTIVATE,
    EV_PH_DEACTIVATE,
    EV_RESET_IND,
    EV_DEACT_CNF,
    EV_DEACT_IND,
    EV_POWER_UP,
    EV_RSYNC_IND,
    EV_INFO2_IND,
    EV_INFO4_IND,
    EV_TIMER_DEACT,
    EV_TIMER_ACT,
    EV_TIMER3,
};

#define L1_EVENT_COUNT (EV_TIMER3 + 1)

static char *strL1Event[] =
{
    "EV_PH_ACTIVATE",
    "EV_PH_DEACTIVATE",
    "EV_RESET_IND",
    "EV_DEACT_CNF",
    "EV_DEACT_IND",
    "EV_POWER_UP",
    "EV_RSYNC_IND",
    "EV_INFO2_IND",
    "EV_INFO4_IND",
    "EV_TIMER_DEACT",
    "EV_TIMER_ACT",
    "EV_TIMER3",
};

void
debugl1(struct IsdnCardState *cs, char *fmt, ...)
{
    va_list args;
    char tmp[8];

    va_start(args, fmt);
    sprintf(tmp, "Card%d ", cs->cardnr + 1);
    VHiSax_putstatus(cs, tmp, fmt, args);
    va_end(args);
}

static void
l1m_debug(struct FsmInst *fi, char *fmt, ...)
{
    va_list args;
    struct PStack *st = fi->userdata;
    struct IsdnCardState *cs = st->l1.hardware;
    char tmp[8];

    va_start(args, fmt);
    sprintf(tmp, "Card%d ", cs->cardnr + 1);
    VHiSax_putstatus(cs, tmp, fmt, args);
    va_end(args);
}

static void
L1activated(struct IsdnCardState *cs)
{
    struct PStack *st;

    st = cs->stlist;
    while (st) {
        if (test_and_clear_bit(FLG_L1_ACTIVATING, &st->l1.Flags))
            st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
        else
            st->l1.l1l2(st, PH_ACTIVATE | INDICATION, NULL);
        st = st->next;
    }
}

static void
L1deactivated(struct IsdnCardState *cs)
{
    struct PStack *st;

    st = cs->stlist;
    while (st) {
        if (test_bit(FLG_L1_DBUSY, &cs->HW_Flags))
            st->l1.l1l2(st, PH_PAUSE | CONFIRM, NULL);
        st->l1.l1l2(st, PH_DEACTIVATE | INDICATION, NULL);
        st = st->next;
    }
    test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags);
}

void
DChannel_proc_xmt(struct IsdnCardState *cs)
{
    struct PStack *stptr;

    if (cs->tx_skb)
        return;

    stptr = cs->stlist;
    while (stptr != NULL) {
        if (test_and_clear_bit(FLG_L1_PULL_REQ, &stptr->l1.Flags)) {
            stptr->l1.l1l2(stptr, PH_PULL | CONFIRM, NULL);
            break;
        } else
            stptr = stptr->next;
    }
}

void
DChannel_proc_rcv(struct IsdnCardState *cs)
{
    struct sk_buff *skb, *nskb;
    struct PStack *stptr = cs->stlist;
    int found, tei, sapi;

    if (stptr)
        if (test_bit(FLG_L1_ACTTIMER, &stptr->l1.Flags))
            FsmEvent(&stptr->l1.l1m, EV_TIMER_ACT, NULL);
    while ((skb = skb_dequeue(&cs->rq))) {
#ifdef L2FRAME_DEBUG        /* psa */
        if (cs->debug & L1_DEB_LAPD)
            Logl2Frame(cs, skb, "PH_DATA", 1);
#endif
        stptr = cs->stlist;
        if (skb->len < 3) {
            debugl1(cs, "D-channel frame too short(%d)", skb->len);
            dev_kfree_skb(skb);
            return;
        }
        if ((skb->data[0] & 1) || !(skb->data[1] & 1)) {
            debugl1(cs, "D-channel frame wrong EA0/EA1");
            dev_kfree_skb(skb);
            return;
        }
        sapi = skb->data[0] >> 2;
        tei = skb->data[1] >> 1;
        if (cs->debug & DEB_DLOG_HEX)
            LogFrame(cs, skb->data, skb->len);
        if (cs->debug & DEB_DLOG_VERBOSE)
            dlogframe(cs, skb, 1);
        if (tei == GROUP_TEI) {
            if (sapi == CTRL_SAPI) { /* sapi 0 */
                while (stptr != NULL) {
                    if ((nskb = skb_clone(skb, GFP_ATOMIC)))
                        stptr->l1.l1l2(stptr, PH_DATA | INDICATION, nskb);
                    else
                        printk(KERN_WARNING "HiSax: isdn broadcast buffer shortage\n");
                    stptr = stptr->next;
                }
            } else if (sapi == TEI_SAPI) {
                while (stptr != NULL) {
                    if ((nskb = skb_clone(skb, GFP_ATOMIC)))
                        stptr->l1.l1tei(stptr, PH_DATA | INDICATION, nskb);
                    else
                        printk(KERN_WARNING "HiSax: tei broadcast buffer shortage\n");
                    stptr = stptr->next;
                }
            }
            dev_kfree_skb(skb);
        } else if (sapi == CTRL_SAPI) { /* sapi 0 */
            found = 0;
            while (stptr != NULL)
                if (tei == stptr->l2.tei) {
                    stptr->l1.l1l2(stptr, PH_DATA | INDICATION, skb);
                    found = !0;
                    break;
                } else
                    stptr = stptr->next;
            if (!found)
                dev_kfree_skb(skb);
        } else
            dev_kfree_skb(skb);
    }
}

static void
BChannel_proc_xmt(struct BCState *bcs)
{
    struct PStack *st = bcs->st;

    if (test_bit(BC_FLG_BUSY, &bcs->Flag)) {
        debugl1(bcs->cs, "BC_BUSY Error");
        return;
    }

    if (test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags))
        st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
    if (!test_bit(BC_FLG_ACTIV, &bcs->Flag)) {
        if (!test_bit(BC_FLG_BUSY, &bcs->Flag) &&
            skb_queue_empty(&bcs->squeue)) {
            st->l2.l2l1(st, PH_DEACTIVATE | CONFIRM, NULL);
        }
    }
}

static void
BChannel_proc_rcv(struct BCState *bcs)
{
    struct sk_buff *skb;

    if (bcs->st->l1.l1m.state == ST_L1_WAIT_ACT) {
        FsmDelTimer(&bcs->st->l1.timer, 4);
        FsmEvent(&bcs->st->l1.l1m, EV_TIMER_ACT, NULL);
    }
    while ((skb = skb_dequeue(&bcs->rqueue))) {
        bcs->st->l1.l1l2(bcs->st, PH_DATA | INDICATION, skb);
    }
}

static void
BChannel_proc_ack(struct BCState *bcs)
{
    u_long  flags;
    int ack;

    spin_lock_irqsave(&bcs->aclock, flags);
    ack = bcs->ackcnt;
    bcs->ackcnt = 0;
    spin_unlock_irqrestore(&bcs->aclock, flags);
    if (ack)
        lli_writewakeup(bcs->st, ack);
}

void
BChannel_bh(struct work_struct *work)
{
    struct BCState *bcs = container_of(work, struct BCState, tqueue);

    if (!bcs)
        return;
    if (test_and_clear_bit(B_RCVBUFREADY, &bcs->event))
        BChannel_proc_rcv(bcs);
    if (test_and_clear_bit(B_XMTBUFREADY, &bcs->event))
        BChannel_proc_xmt(bcs);
    if (test_and_clear_bit(B_ACKPENDING, &bcs->event))
        BChannel_proc_ack(bcs);
}

void
HiSax_addlist(struct IsdnCardState *cs,
          struct PStack *st)
{
    st->next = cs->stlist;
    cs->stlist = st;
}

void
HiSax_rmlist(struct IsdnCardState *cs,
         struct PStack *st)
{
    struct PStack *p;

    FsmDelTimer(&st->l1.timer, 0);
    if (cs->stlist == st)
        cs->stlist = st->next;
    else {
        p = cs->stlist;
        while (p)
            if (p->next == st) {
                p->next = st->next;
                return;
            } else
                p = p->next;
    }
}

void
init_bcstate(struct IsdnCardState *cs, int bc)
{
    struct BCState *bcs = cs->bcs + bc;

    bcs->cs = cs;
    bcs->channel = bc;
    INIT_WORK(&bcs->tqueue, BChannel_bh);
    spin_lock_init(&bcs->aclock);
    bcs->BC_SetStack = NULL;
    bcs->BC_Close = NULL;
    bcs->Flag = 0;
}

#ifdef L2FRAME_DEBUG        /* psa */

static char *
l2cmd(u_char cmd)
{
    switch (cmd & ~0x10) {
    case 1:
        return "RR";
    case 5:
        return "RNR";
    case 9:
        return "REJ";
    case 0x6f:
        return "SABME";
    case 0x0f:
        return "DM";
    case 3:
        return "UI";
    case 0x43:
        return "DISC";
    case 0x63:
        return "UA";
    case 0x87:
        return "FRMR";
    case 0xaf:
        return "XID";
    default:
        if (!(cmd & 1))
            return "I";
        else
            return "invalid command";
    }
}

static char tmpdeb[32];

static char *
l2frames(u_char *ptr)
{
    switch (ptr[2] & ~0x10) {
    case 1:
    case 5:
    case 9:
        sprintf(tmpdeb, "%s[%d](nr %d)", l2cmd(ptr[2]), ptr[3] & 1, ptr[3] >> 1);
        break;
    case 0x6f:
    case 0x0f:
    case 3:
    case 0x43:
    case 0x63:
    case 0x87:
    case 0xaf:
        sprintf(tmpdeb, "%s[%d]", l2cmd(ptr[2]), (ptr[2] & 0x10) >> 4);
        break;
    default:
        if (!(ptr[2] & 1)) {
            sprintf(tmpdeb, "I[%d](ns %d, nr %d)", ptr[3] & 1, ptr[2] >> 1, ptr[3] >> 1);
            break;
        } else
            return "invalid command";
    }


    return tmpdeb;
}

void
Logl2Frame(struct IsdnCardState *cs, struct sk_buff *skb, char *buf, int dir)
{
    u_char *ptr;

    ptr = skb->data;

    if (ptr[0] & 1 || !(ptr[1] & 1))
        debugl1(cs, "Address not LAPD");
    else
        debugl1(cs, "%s %s: %s%c (sapi %d, tei %d)",
            (dir ? "<-" : "->"), buf, l2frames(ptr),
            ((ptr[0] & 2) >> 1) == dir ? 'C' : 'R', ptr[0] >> 2, ptr[1] >> 1);
}
#endif

static void
l1_reset(struct FsmInst *fi, int event, void *arg)
{
    FsmChangeState(fi, ST_L1_F3);
}

static void
l1_deact_cnf(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_F3);
    if (test_bit(FLG_L1_ACTIVATING, &st->l1.Flags))
        st->l1.l1hw(st, HW_ENABLE | REQUEST, NULL);
}

static void
l1_deact_req_s(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_F3);
    FsmRestartTimer(&st->l1.timer, 550, EV_TIMER_DEACT, NULL, 2);
    test_and_set_bit(FLG_L1_DEACTTIMER, &st->l1.Flags);
}

static void
l1_power_up_s(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    if (test_bit(FLG_L1_ACTIVATING, &st->l1.Flags)) {
        FsmChangeState(fi, ST_L1_F4);
        st->l1.l1hw(st, HW_INFO3 | REQUEST, NULL);
        FsmRestartTimer(&st->l1.timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
        test_and_set_bit(FLG_L1_T3RUN, &st->l1.Flags);
    } else
        FsmChangeState(fi, ST_L1_F3);
}

static void
l1_go_F5(struct FsmInst *fi, int event, void *arg)
{
    FsmChangeState(fi, ST_L1_F5);
}

static void
l1_go_F8(struct FsmInst *fi, int event, void *arg)
{
    FsmChangeState(fi, ST_L1_F8);
}

static void
l1_info2_ind(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

#ifdef HISAX_UINTERFACE
    if (test_bit(FLG_L1_UINT, &st->l1.Flags))
        FsmChangeState(fi, ST_L1_SYNC2);
    else
#endif
        FsmChangeState(fi, ST_L1_F6);
    st->l1.l1hw(st, HW_INFO3 | REQUEST, NULL);
}

static void
l1_info4_ind(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

#ifdef HISAX_UINTERFACE
    if (test_bit(FLG_L1_UINT, &st->l1.Flags))
        FsmChangeState(fi, ST_L1_TRANS);
    else
#endif
        FsmChangeState(fi, ST_L1_F7);
    st->l1.l1hw(st, HW_INFO3 | REQUEST, NULL);
    if (test_and_clear_bit(FLG_L1_DEACTTIMER, &st->l1.Flags))
        FsmDelTimer(&st->l1.timer, 4);
    if (!test_bit(FLG_L1_ACTIVATED, &st->l1.Flags)) {
        if (test_and_clear_bit(FLG_L1_T3RUN, &st->l1.Flags))
            FsmDelTimer(&st->l1.timer, 3);
        FsmRestartTimer(&st->l1.timer, 110, EV_TIMER_ACT, NULL, 2);
        test_and_set_bit(FLG_L1_ACTTIMER, &st->l1.Flags);
    }
}

static void
l1_timer3(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    test_and_clear_bit(FLG_L1_T3RUN, &st->l1.Flags);
    if (test_and_clear_bit(FLG_L1_ACTIVATING, &st->l1.Flags))
        L1deactivated(st->l1.hardware);

#ifdef HISAX_UINTERFACE
    if (!test_bit(FLG_L1_UINT, &st->l1.Flags))
#endif
        if (st->l1.l1m.state != ST_L1_F6) {
            FsmChangeState(fi, ST_L1_F3);
            st->l1.l1hw(st, HW_ENABLE | REQUEST, NULL);
        }
}

static void
l1_timer_act(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    test_and_clear_bit(FLG_L1_ACTTIMER, &st->l1.Flags);
    test_and_set_bit(FLG_L1_ACTIVATED, &st->l1.Flags);
    L1activated(st->l1.hardware);
}

static void
l1_timer_deact(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    test_and_clear_bit(FLG_L1_DEACTTIMER, &st->l1.Flags);
    test_and_clear_bit(FLG_L1_ACTIVATED, &st->l1.Flags);
    L1deactivated(st->l1.hardware);
    st->l1.l1hw(st, HW_DEACTIVATE | RESPONSE, NULL);
}

static void
l1_activate_s(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    st->l1.l1hw(st, HW_RESET | REQUEST, NULL);
}

static void
l1_activate_no(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    if ((!test_bit(FLG_L1_DEACTTIMER, &st->l1.Flags)) && (!test_bit(FLG_L1_T3RUN, &st->l1.Flags))) {
        test_and_clear_bit(FLG_L1_ACTIVATING, &st->l1.Flags);
        L1deactivated(st->l1.hardware);
    }
}

static struct FsmNode L1SFnList[] __initdata =
{
    {ST_L1_F3, EV_PH_ACTIVATE, l1_activate_s},
    {ST_L1_F6, EV_PH_ACTIVATE, l1_activate_no},
    {ST_L1_F8, EV_PH_ACTIVATE, l1_activate_no},
    {ST_L1_F3, EV_RESET_IND, l1_reset},
    {ST_L1_F4, EV_RESET_IND, l1_reset},
    {ST_L1_F5, EV_RESET_IND, l1_reset},
    {ST_L1_F6, EV_RESET_IND, l1_reset},
    {ST_L1_F7, EV_RESET_IND, l1_reset},
    {ST_L1_F8, EV_RESET_IND, l1_reset},
    {ST_L1_F3, EV_DEACT_CNF, l1_deact_cnf},
    {ST_L1_F4, EV_DEACT_CNF, l1_deact_cnf},
    {ST_L1_F5, EV_DEACT_CNF, l1_deact_cnf},
    {ST_L1_F6, EV_DEACT_CNF, l1_deact_cnf},
    {ST_L1_F7, EV_DEACT_CNF, l1_deact_cnf},
    {ST_L1_F8, EV_DEACT_CNF, l1_deact_cnf},
    {ST_L1_F6, EV_DEACT_IND, l1_deact_req_s},
    {ST_L1_F7, EV_DEACT_IND, l1_deact_req_s},
    {ST_L1_F8, EV_DEACT_IND, l1_deact_req_s},
    {ST_L1_F3, EV_POWER_UP, l1_power_up_s},
    {ST_L1_F4, EV_RSYNC_IND, l1_go_F5},
    {ST_L1_F6, EV_RSYNC_IND, l1_go_F8},
    {ST_L1_F7, EV_RSYNC_IND, l1_go_F8},
    {ST_L1_F3, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_F4, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_F5, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_F7, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_F8, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_F3, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_F4, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_F5, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_F6, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_F8, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_F3, EV_TIMER3, l1_timer3},
    {ST_L1_F4, EV_TIMER3, l1_timer3},
    {ST_L1_F5, EV_TIMER3, l1_timer3},
    {ST_L1_F6, EV_TIMER3, l1_timer3},
    {ST_L1_F8, EV_TIMER3, l1_timer3},
    {ST_L1_F7, EV_TIMER_ACT, l1_timer_act},
    {ST_L1_F3, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_F4, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_F5, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_F6, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_F7, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_F8, EV_TIMER_DEACT, l1_timer_deact},
};

#ifdef HISAX_UINTERFACE
static void
l1_deact_req_u(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_RESET);
    FsmRestartTimer(&st->l1.timer, 550, EV_TIMER_DEACT, NULL, 2);
    test_and_set_bit(FLG_L1_DEACTTIMER, &st->l1.Flags);
    st->l1.l1hw(st, HW_ENABLE | REQUEST, NULL);
}

static void
l1_power_up_u(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmRestartTimer(&st->l1.timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
    test_and_set_bit(FLG_L1_T3RUN, &st->l1.Flags);
}

static void
l1_info0_ind(struct FsmInst *fi, int event, void *arg)
{
    FsmChangeState(fi, ST_L1_DEACT);
}

static void
l1_activate_u(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    st->l1.l1hw(st, HW_INFO1 | REQUEST, NULL);
}

static struct FsmNode L1UFnList[] __initdata =
{
    {ST_L1_RESET, EV_DEACT_IND, l1_deact_req_u},
    {ST_L1_DEACT, EV_DEACT_IND, l1_deact_req_u},
    {ST_L1_SYNC2, EV_DEACT_IND, l1_deact_req_u},
    {ST_L1_TRANS, EV_DEACT_IND, l1_deact_req_u},
    {ST_L1_DEACT, EV_PH_ACTIVATE, l1_activate_u},
    {ST_L1_DEACT, EV_POWER_UP, l1_power_up_u},
    {ST_L1_DEACT, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_TRANS, EV_INFO2_IND, l1_info2_ind},
    {ST_L1_RESET, EV_DEACT_CNF, l1_info0_ind},
    {ST_L1_DEACT, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_SYNC2, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_RESET, EV_INFO4_IND, l1_info4_ind},
    {ST_L1_DEACT, EV_TIMER3, l1_timer3},
    {ST_L1_SYNC2, EV_TIMER3, l1_timer3},
    {ST_L1_TRANS, EV_TIMER_ACT, l1_timer_act},
    {ST_L1_DEACT, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_SYNC2, EV_TIMER_DEACT, l1_timer_deact},
    {ST_L1_RESET, EV_TIMER_DEACT, l1_timer_deact},
};

#endif

static void
l1b_activate(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_WAIT_ACT);
    FsmRestartTimer(&st->l1.timer, st->l1.delay, EV_TIMER_ACT, NULL, 2);
}

static void
l1b_deactivate(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_WAIT_DEACT);
    FsmRestartTimer(&st->l1.timer, 10, EV_TIMER_DEACT, NULL, 2);
}

static void
l1b_timer_act(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_ACTIV);
    st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
}

static void
l1b_timer_deact(struct FsmInst *fi, int event, void *arg)
{
    struct PStack *st = fi->userdata;

    FsmChangeState(fi, ST_L1_NULL);
    st->l2.l2l1(st, PH_DEACTIVATE | CONFIRM, NULL);
}

static struct FsmNode L1BFnList[] __initdata =
{
    {ST_L1_NULL, EV_PH_ACTIVATE, l1b_activate},
    {ST_L1_WAIT_ACT, EV_TIMER_ACT, l1b_timer_act},
    {ST_L1_ACTIV, EV_PH_DEACTIVATE, l1b_deactivate},
    {ST_L1_WAIT_DEACT, EV_TIMER_DEACT, l1b_timer_deact},
};

int __init
Isdnl1New(void)
{
    int retval;

    l1fsm_s.state_count = L1S_STATE_COUNT;
    l1fsm_s.event_count = L1_EVENT_COUNT;
    l1fsm_s.strEvent = strL1Event;
    l1fsm_s.strState = strL1SState;
    retval = FsmNew(&l1fsm_s, L1SFnList, ARRAY_SIZE(L1SFnList));
    if (retval)
        return retval;

    l1fsm_b.state_count = L1B_STATE_COUNT;
    l1fsm_b.event_count = L1_EVENT_COUNT;
    l1fsm_b.strEvent = strL1Event;
    l1fsm_b.strState = strL1BState;
    retval = FsmNew(&l1fsm_b, L1BFnList, ARRAY_SIZE(L1BFnList));
    if (retval) {
        FsmFree(&l1fsm_s);
        return retval;
    }
#ifdef HISAX_UINTERFACE
    l1fsm_u.state_count = L1U_STATE_COUNT;
    l1fsm_u.event_count = L1_EVENT_COUNT;
    l1fsm_u.strEvent = strL1Event;
    l1fsm_u.strState = strL1UState;
    retval = FsmNew(&l1fsm_u, L1UFnList, ARRAY_SIZE(L1UFnList));
    if (retval) {
        FsmFree(&l1fsm_s);
        FsmFree(&l1fsm_b);
        return retval;
    }
#endif
    return 0;
}

void Isdnl1Free(void)
{
#ifdef HISAX_UINTERFACE
    FsmFree(&l1fsm_u);
#endif
    FsmFree(&l1fsm_s);
    FsmFree(&l1fsm_b);
}

static void
dch_l2l1(struct PStack *st, int pr, void *arg)
{
    struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;

    switch (pr) {
    case (PH_DATA | REQUEST):
    case (PH_PULL | REQUEST):
    case (PH_PULL | INDICATION):
        st->l1.l1hw(st, pr, arg);
        break;
    case (PH_ACTIVATE | REQUEST):
        if (cs->debug)
            debugl1(cs, "PH_ACTIVATE_REQ %s",
                st->l1.l1m.fsm->strState[st->l1.l1m.state]);
        if (test_bit(FLG_L1_ACTIVATED, &st->l1.Flags))
            st->l1.l1l2(st, PH_ACTIVATE | CONFIRM, NULL);
        else {
            test_and_set_bit(FLG_L1_ACTIVATING, &st->l1.Flags);
            FsmEvent(&st->l1.l1m, EV_PH_ACTIVATE, arg);
        }
        break;
    case (PH_TESTLOOP | REQUEST):
        if (1 & (long) arg)
            debugl1(cs, "PH_TEST_LOOP B1");
        if (2 & (long) arg)
            debugl1(cs, "PH_TEST_LOOP B2");
        if (!(3 & (long) arg))
            debugl1(cs, "PH_TEST_LOOP DISABLED");
        st->l1.l1hw(st, HW_TESTLOOP | REQUEST, arg);
        break;
    default:
        if (cs->debug)
            debugl1(cs, "dch_l2l1 msg %04X unhandled", pr);
        break;
    }
}

void
l1_msg(struct IsdnCardState *cs, int pr, void *arg) {
    struct PStack *st;

    st = cs->stlist;

    while (st) {
        switch (pr) {
        case (HW_RESET | INDICATION):
            FsmEvent(&st->l1.l1m, EV_RESET_IND, arg);
            break;
        case (HW_DEACTIVATE | CONFIRM):
            FsmEvent(&st->l1.l1m, EV_DEACT_CNF, arg);
            break;
        case (HW_DEACTIVATE | INDICATION):
            FsmEvent(&st->l1.l1m, EV_DEACT_IND, arg);
            break;
        case (HW_POWERUP | CONFIRM):
            FsmEvent(&st->l1.l1m, EV_POWER_UP, arg);
            break;
        case (HW_RSYNC | INDICATION):
            FsmEvent(&st->l1.l1m, EV_RSYNC_IND, arg);
            break;
        case (HW_INFO2 | INDICATION):
            FsmEvent(&st->l1.l1m, EV_INFO2_IND, arg);
            break;
        case (HW_INFO4_P8 | INDICATION):
        case (HW_INFO4_P10 | INDICATION):
            FsmEvent(&st->l1.l1m, EV_INFO4_IND, arg);
            break;
        default:
            if (cs->debug)
                debugl1(cs, "l1msg %04X unhandled", pr);
            break;
        }
        st = st->next;
    }
}

void
l1_msg_b(struct PStack *st, int pr, void *arg) {
    switch (pr) {
    case (PH_ACTIVATE | REQUEST):
        FsmEvent(&st->l1.l1m, EV_PH_ACTIVATE, NULL);
        break;
    case (PH_DEACTIVATE | REQUEST):
        FsmEvent(&st->l1.l1m, EV_PH_DEACTIVATE, NULL);
        break;
    }
}

void
setstack_HiSax(struct PStack *st, struct IsdnCardState *cs)
{
    st->l1.hardware = cs;
    st->protocol = cs->protocol;
    st->l1.l1m.fsm = &l1fsm_s;
    st->l1.l1m.state = ST_L1_F3;
    st->l1.Flags = 0;
#ifdef HISAX_UINTERFACE
    if (test_bit(FLG_HW_L1_UINT, &cs->HW_Flags)) {
        st->l1.l1m.fsm = &l1fsm_u;
        st->l1.l1m.state = ST_L1_RESET;
        st->l1.Flags = FLG_L1_UINT;
    }
#endif
    st->l1.l1m.debug = cs->debug;
    st->l1.l1m.userdata = st;
    st->l1.l1m.userint = 0;
    st->l1.l1m.printdebug = l1m_debug;
    FsmInitTimer(&st->l1.l1m, &st->l1.timer);
    setstack_tei(st);
    setstack_manager(st);
    st->l1.stlistp = &(cs->stlist);
    st->l2.l2l1  = dch_l2l1;
    if (cs->setstack_d)
        cs->setstack_d(st, cs);
}

void
setstack_l1_B(struct PStack *st)
{
    struct IsdnCardState *cs = st->l1.hardware;

    st->l1.l1m.fsm = &l1fsm_b;
    st->l1.l1m.state = ST_L1_NULL;
    st->l1.l1m.debug = cs->debug;
    st->l1.l1m.userdata = st;
    st->l1.l1m.userint = 0;
    st->l1.l1m.printdebug = l1m_debug;
    st->l1.Flags = 0;
    FsmInitTimer(&st->l1.l1m, &st->l1.timer);
}