linux-arkmicro/linux/drivers/isdn/hisax/arcofi.c

/* $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      <keil@isdn4linux.de>
 *
 * 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);
	}
	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 timer_list *t) {
	struct IsdnCardState *cs = from_timer(cs, t, dc.isac.arcofitimer);
	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) {
	timer_setup(&cs->dc.isac.arcofitimer, arcofi_timer, 0);
	init_waitqueue_head(&cs->dc.isac.arcofi_wait);
	test_and_set_bit(HW_ARCOFI, &cs->HW_Flags);
}