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kernel-ark/drivers/isdn/sc/interrupt.c
Jeff Garzik 080eb42f31 isdn/sc: irq handler clean 
* pass card number to irq handler

* use card number in irq handler to avoid looping through each adapter

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-23 19:53:16 -04:00

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/* $Id: interrupt.c,v 1.4.8.3 2001/09/23 22:24:59 kai Exp $
*
* Copyright (C) 1996 SpellCaster Telecommunications Inc.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* For more information, please contact gpl-info@spellcast.com or write:
*
* SpellCaster Telecommunications Inc.
* 5621 Finch Avenue East, Unit #3
* Scarborough, Ontario Canada
* M1B 2T9
* +1 (416) 297-8565
* +1 (416) 297-6433 Facsimile
*/
#include "includes.h"
#include "hardware.h"
#include "message.h"
#include "card.h"
#include <linux/interrupt.h>
/*
*
*/
irqreturn_t interrupt_handler(int dummy, void *card_inst)
{
RspMessage rcvmsg;
int channel;
int card = (int)(unsigned long) card_inst;
if(!IS_VALID_CARD(card)) {
pr_debug("Invalid param: %d is not a valid card id\n", card);
return IRQ_NONE;
}
pr_debug("%s: Entered Interrupt handler\n",
sc_adapter[card]->devicename);
/*
* Pull all of the waiting messages off the response queue
*/
while (!receivemessage(card, &rcvmsg)) {
/*
* Push the message to the adapter structure for
* send_and_receive to snoop
*/
if(sc_adapter[card]->want_async_messages)
memcpy(&(sc_adapter[card]->async_msg),
&rcvmsg, sizeof(RspMessage));
channel = (unsigned int) rcvmsg.phy_link_no;
/*
* Trap Invalid request messages
*/
if(IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
pr_debug("%s: Invalid request Message, rsp_status = %d\n",
sc_adapter[card]->devicename,
rcvmsg.rsp_status);
break;
}
/*
* Check for a linkRead message
*/
if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
{
pr_debug("%s: Received packet 0x%x bytes long at 0x%lx\n",
sc_adapter[card]->devicename,
rcvmsg.msg_data.response.msg_len,
rcvmsg.msg_data.response.buff_offset);
rcvpkt(card, &rcvmsg);
continue;
}
/*
* Handle a write acknoledgement
*/
if(IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
pr_debug("%s: Packet Send ACK on channel %d\n",
sc_adapter[card]->devicename,
rcvmsg.phy_link_no);
sc_adapter[card]->channel[rcvmsg.phy_link_no-1].free_sendbufs++;
continue;
}
/*
* Handle a connection message
*/
if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect))
{
unsigned int callid;
setup_parm setup;
pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
sc_adapter[card]->devicename,
rcvmsg.phy_link_no,
rcvmsg.rsp_status,
rcvmsg.msg_data.byte_array[2]);
memcpy(&callid,rcvmsg.msg_data.byte_array,sizeof(int));
if(callid>=0x8000 && callid<=0xFFFF)
{
pr_debug("%s: Got Dial-Out Rsp\n",
sc_adapter[card]->devicename);
indicate_status(card, ISDN_STAT_DCONN,
(unsigned long)rcvmsg.phy_link_no-1,NULL);
}
else if(callid>=0x0000 && callid<=0x7FFF)
{
pr_debug("%s: Got Incoming Call\n",
sc_adapter[card]->devicename);
strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4]));
strcpy(setup.eazmsn,
sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn);
setup.si1 = 7;
setup.si2 = 0;
setup.plan = 0;
setup.screen = 0;
indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup);
indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL);
}
continue;
}
/*
* Handle a disconnection message
*/
if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect))
{
pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
sc_adapter[card]->devicename,
rcvmsg.phy_link_no,
rcvmsg.rsp_status,
rcvmsg.msg_data.byte_array[2]);
indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
continue;
}
/*
* Handle a startProc engine up message
*/
if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
pr_debug("%s: Received EngineUp message\n",
sc_adapter[card]->devicename);
sc_adapter[card]->EngineUp = 1;
sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL);
sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL);
init_timer(&sc_adapter[card]->stat_timer);
sc_adapter[card]->stat_timer.function = check_phystat;
sc_adapter[card]->stat_timer.data = card;
sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
add_timer(&sc_adapter[card]->stat_timer);
continue;
}
/*
* Start proc response
*/
if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
pr_debug("%s: StartProc Response Status %d\n",
sc_adapter[card]->devicename,
rcvmsg.rsp_status);
continue;
}
/*
* Handle a GetMyNumber Rsp
*/
if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){
strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array);
continue;
}
/*
* PhyStatus response
*/
if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
unsigned int b1stat, b2stat;
/*
* Covert the message data to the adapter->phystat code
*/
b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];
sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
pr_debug("%s: PhyStat is 0x%2x\n",
sc_adapter[card]->devicename,
sc_adapter[card]->nphystat);
continue;
}
/*
* Handle a GetFramFormat
*/
if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
unsigned int proto = HDLC_PROTO;
/*
* Set board format to HDLC if it wasn't already
*/
pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
sc_adapter[card]->devicename,
rcvmsg.msg_data.byte_array[0]);
sendmessage(card, CEPID, ceReqTypeCall,
ceReqClass0,
ceReqCallSetFrameFormat,
(unsigned char) channel +1,
1,&proto);
}
continue;
}
/*
* Hmm...
*/
pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
sc_adapter[card]->devicename,
rcvmsg.type, rcvmsg.class, rcvmsg.code,
rcvmsg.phy_link_no);
} /* while */
pr_debug("%s: Exiting Interrupt Handler\n",
sc_adapter[card]->devicename);
return IRQ_HANDLED;
}
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