arcofi.c

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/* $Id: arcofi.c,v 1.14.2.3 2004/01/13 14:31:24 keil Exp $
 *
 * Ansteuerung ARCOFI 2165
 *
 * Author       Karsten Keil
 * 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.
 *
 */

#include <linux/sched.h>
#include "hisax.h"
#include "isdnl1.h"
#include "isac.h"
#include "arcofi.h"

#define ARCOFI_TIMER_VALUE  20

static void
add_arcofi_timer(struct IsdnCardState *cs) {
    if (test_and_set_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
        del_timer(&cs->dc.isac.arcofitimer);
    }
    init_timer(&cs->dc.isac.arcofitimer);
    cs->dc.isac.arcofitimer.expires = jiffies + ((ARCOFI_TIMER_VALUE * HZ) / 1000);
    add_timer(&cs->dc.isac.arcofitimer);
}

static void
send_arcofi(struct IsdnCardState *cs) {
    add_arcofi_timer(cs);
    cs->dc.isac.mon_txp = 0;
    cs->dc.isac.mon_txc = cs->dc.isac.arcofi_list->len;
    memcpy(cs->dc.isac.mon_tx, cs->dc.isac.arcofi_list->msg, cs->dc.isac.mon_txc);
    switch (cs->dc.isac.arcofi_bc) {
    case 0: break;
    case 1: cs->dc.isac.mon_tx[1] |= 0x40;
        break;
    default: break;
    }
    cs->dc.isac.mocr &= 0x0f;
    cs->dc.isac.mocr |= 0xa0;
    cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
    (void) cs->readisac(cs, ISAC_MOSR);
    cs->writeisac(cs, ISAC_MOX1, cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
    cs->dc.isac.mocr |= 0x10;
    cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
}

int
arcofi_fsm(struct IsdnCardState *cs, int event, void *data) {
    if (cs->debug & L1_DEB_MONITOR) {
        debugl1(cs, "arcofi state %d event %d", cs->dc.isac.arcofi_state, event);
    }
    if (event == ARCOFI_TIMEOUT) {
        cs->dc.isac.arcofi_state = ARCOFI_NOP;
        test_and_set_bit(FLG_ARCOFI_ERROR, &cs->HW_Flags);
        wake_up(&cs->dc.isac.arcofi_wait);
        return (1);
    }
    switch (cs->dc.isac.arcofi_state) {
    case ARCOFI_NOP:
        if (event == ARCOFI_START) {
            cs->dc.isac.arcofi_list = data;
            cs->dc.isac.arcofi_state = ARCOFI_TRANSMIT;
            send_arcofi(cs);
        }
        break;
    case ARCOFI_TRANSMIT:
        if (event == ARCOFI_TX_END) {
            if (cs->dc.isac.arcofi_list->receive) {
                add_arcofi_timer(cs);
                cs->dc.isac.arcofi_state = ARCOFI_RECEIVE;
            } else {
                if (cs->dc.isac.arcofi_list->next) {
                    cs->dc.isac.arcofi_list =
                        cs->dc.isac.arcofi_list->next;
                    send_arcofi(cs);
                } else {
                    if (test_and_clear_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
                        del_timer(&cs->dc.isac.arcofitimer);
                    }
                    cs->dc.isac.arcofi_state = ARCOFI_NOP;
                    wake_up(&cs->dc.isac.arcofi_wait);
                }
            }
        }
        break;
    case ARCOFI_RECEIVE:
        if (event == ARCOFI_RX_END) {
            if (cs->dc.isac.arcofi_list->next) {
                cs->dc.isac.arcofi_list =
                    cs->dc.isac.arcofi_list->next;
                cs->dc.isac.arcofi_state = ARCOFI_TRANSMIT;
                send_arcofi(cs);
            } else {
                if (test_and_clear_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
                    del_timer(&cs->dc.isac.arcofitimer);
                }
                cs->dc.isac.arcofi_state = ARCOFI_NOP;
                wake_up(&cs->dc.isac.arcofi_wait);
            }
        }
        break;
    default:
        debugl1(cs, "Arcofi unknown state %x", cs->dc.isac.arcofi_state);
        return (2);
    }
    return (0);
}

static void
arcofi_timer(struct IsdnCardState *cs) {
    arcofi_fsm(cs, ARCOFI_TIMEOUT, NULL);
}

void
clear_arcofi(struct IsdnCardState *cs) {
    if (test_and_clear_bit(FLG_ARCOFI_TIMER, &cs->HW_Flags)) {
        del_timer(&cs->dc.isac.arcofitimer);
    }
}

void
init_arcofi(struct IsdnCardState *cs) {
    cs->dc.isac.arcofitimer.function = (void *) arcofi_timer;
    cs->dc.isac.arcofitimer.data = (long) cs;
    init_timer(&cs->dc.isac.arcofitimer);
    init_waitqueue_head(&cs->dc.isac.arcofi_wait);
    test_and_set_bit(HW_ARCOFI, &cs->HW_Flags);
}