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interrupt.c

/* $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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