drivers/isdn/sc/interrupt.c

   1 /* $Id: interrupt.c,v 1.4.8.3 2001/09/23 22:24:59 kai Exp $
   2  *
   3  * Copyright (C) 1996  SpellCaster Telecommunications Inc.
   4  *
   5  * This software may be used and distributed according to the terms
   6  * of the GNU General Public License, incorporated herein by reference.
   7  *
   8  * For more information, please contact gpl-info@spellcast.com or write:
   9  *
  10  *     SpellCaster Telecommunications Inc.
  11  *     5621 Finch Avenue East, Unit #3
  12  *     Scarborough, Ontario  Canada
  13  *     M1B 2T9
  14  *     +1 (416) 297-8565
  15  *     +1 (416) 297-6433 Facsimile
  16  */
  17
  18 #include "includes.h"
  19 #include "hardware.h"
  20 #include "message.h"
  21 #include "card.h"
  22 #include <linux/interrupt.h>
  23
  24 static int get_card_from_irq(int irq)
  25 {
  26         int i;
  27
  28         for(i = 0 ; i < cinst ; i++) {
  29                 if(sc_adapter[i]->interrupt == irq)
  30                         return i;
  31         }
  32         return -1;
  33 }
  34
  35 /*
  36  *
  37  */
  38 irqreturn_t interrupt_handler(int interrupt, void *cardptr)
  39 {
  40
  41         RspMessage rcvmsg;
  42         int channel;
  43         int card;
  44
  45         card = get_card_from_irq(interrupt);
  46
  47         if(!IS_VALID_CARD(card)) {
  48                 pr_debug("Invalid param: %d is not a valid card id\n", card);
  49                 return IRQ_NONE;
  50         }
  51
  52         pr_debug("%s: Entered Interrupt handler\n",
  53                         sc_adapter[card]->devicename);
  54
  55         /*
  56          * Pull all of the waiting messages off the response queue
  57          */
  58         while (!receivemessage(card, &rcvmsg)) {
  59                 /*
  60                  * Push the message to the adapter structure for
  61                  * send_and_receive to snoop
  62                  */
  63                 if(sc_adapter[card]->want_async_messages)
  64                         memcpy(&(sc_adapter[card]->async_msg),
  65                                         &rcvmsg, sizeof(RspMessage));
  66
  67                 channel = (unsigned int) rcvmsg.phy_link_no;
  68
  69                 /*
  70                  * Trap Invalid request messages
  71                  */
  72                 if(IS_CM_MESSAGE(rcvmsg, 0, 0, Invalid)) {
  73                         pr_debug("%s: Invalid request Message, rsp_status = %d\n",
  74                                 sc_adapter[card]->devicename,
  75                                 rcvmsg.rsp_status);
  76                         break;
  77                 }
  78
  79                 /*
  80                  * Check for a linkRead message
  81                  */
  82                 if (IS_CE_MESSAGE(rcvmsg, Lnk, 1, Read))
  83                 {
  84                         pr_debug("%s: Received packet 0x%x bytes long at 0x%lx\n",
  85                                                 sc_adapter[card]->devicename,
  86                                                 rcvmsg.msg_data.response.msg_len,
  87                                                 rcvmsg.msg_data.response.buff_offset);
  88                         rcvpkt(card, &rcvmsg);
  89                         continue;
  90
  91                 }
  92
  93                 /*
  94                  * Handle a write acknoledgement
  95                  */
  96                 if(IS_CE_MESSAGE(rcvmsg, Lnk, 1, Write)) {
  97                         pr_debug("%s: Packet Send ACK on channel %d\n",
  98                                 sc_adapter[card]->devicename,
  99                                 rcvmsg.phy_link_no);
 100                         sc_adapter[card]->channel[rcvmsg.phy_link_no-1].free_sendbufs++;
 101                         continue;
 102                 }
 103
 104                 /*
 105                  * Handle a connection message
 106                  */
 107                 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Connect))
 108                 {
 109                         unsigned int callid;
 110                         setup_parm setup;
 111                         pr_debug("%s: Connect message: line %d: status %d: cause 0x%x\n",
 112                                                 sc_adapter[card]->devicename,
 113                                                 rcvmsg.phy_link_no,
 114                                                 rcvmsg.rsp_status,
 115                                                 rcvmsg.msg_data.byte_array[2]);
 116
 117                         memcpy(&callid,rcvmsg.msg_data.byte_array,sizeof(int));
 118                         if(callid>=0x8000 && callid<=0xFFFF)
 119                         {
 120                                 pr_debug("%s: Got Dial-Out Rsp\n",
 121                                         sc_adapter[card]->devicename);
 122                                 indicate_status(card, ISDN_STAT_DCONN,
 123                                                 (unsigned long)rcvmsg.phy_link_no-1,NULL);
 124
 125                         }
 126                         else if(callid>=0x0000 && callid<=0x7FFF)
 127                         {
 128                                 pr_debug("%s: Got Incoming Call\n",
 129                                                 sc_adapter[card]->devicename);
 130                                 strcpy(setup.phone,&(rcvmsg.msg_data.byte_array[4]));
 131                                 strcpy(setup.eazmsn,
 132                                         sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn);
 133                                 setup.si1 = 7;
 134                                 setup.si2 = 0;
 135                                 setup.plan = 0;
 136                                 setup.screen = 0;
 137
 138                                 indicate_status(card, ISDN_STAT_ICALL,(unsigned long)rcvmsg.phy_link_no-1,(char *)&setup);
 139                                 indicate_status(card, ISDN_STAT_DCONN,(unsigned long)rcvmsg.phy_link_no-1,NULL);
 140                         }
 141                         continue;
 142                 }
 143
 144                 /*
 145                  * Handle a disconnection message
 146                  */
 147                 if (IS_CE_MESSAGE(rcvmsg, Phy, 1, Disconnect))
 148                 {
 149                         pr_debug("%s: disconnect message: line %d: status %d: cause 0x%x\n",
 150                                                 sc_adapter[card]->devicename,
 151                                                 rcvmsg.phy_link_no,
 152                                                 rcvmsg.rsp_status,
 153                                                 rcvmsg.msg_data.byte_array[2]);
 154
 155                         indicate_status(card, ISDN_STAT_BHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
 156                         indicate_status(card, ISDN_STAT_DHUP,(unsigned long)rcvmsg.phy_link_no-1,NULL);
 157                         continue;
 158
 159                 }
 160
 161                 /*
 162                  * Handle a startProc engine up message
 163                  */
 164                 if (IS_CM_MESSAGE(rcvmsg, 5, 0, MiscEngineUp)) {
 165                         pr_debug("%s: Received EngineUp message\n",
 166                                 sc_adapter[card]->devicename);
 167                         sc_adapter[card]->EngineUp = 1;
 168                         sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,1,0,NULL);
 169                         sendmessage(card, CEPID,ceReqTypeCall,ceReqClass0,ceReqCallGetMyNumber,2,0,NULL);
 170                         init_timer(&sc_adapter[card]->stat_timer);
 171                         sc_adapter[card]->stat_timer.function = check_phystat;
 172                         sc_adapter[card]->stat_timer.data = card;
 173                         sc_adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;
 174                         add_timer(&sc_adapter[card]->stat_timer);
 175                         continue;
 176                 }
 177
 178                 /*
 179                  * Start proc response
 180                  */
 181                 if (IS_CM_MESSAGE(rcvmsg, 2, 0, StartProc)) {
 182                         pr_debug("%s: StartProc Response Status %d\n",
 183                                 sc_adapter[card]->devicename,
 184                                 rcvmsg.rsp_status);
 185                         continue;
 186                 }
 187
 188                 /*
 189                  * Handle a GetMyNumber Rsp
 190                  */
 191                 if (IS_CE_MESSAGE(rcvmsg,Call,0,GetMyNumber)){
 192                         strcpy(sc_adapter[card]->channel[rcvmsg.phy_link_no-1].dn,rcvmsg.msg_data.byte_array);
 193                         continue;
 194                 }
 195
 196                 /*
 197                  * PhyStatus response
 198                  */
 199                 if(IS_CE_MESSAGE(rcvmsg, Phy, 2, Status)) {
 200                         unsigned int b1stat, b2stat;
 201
 202                         /*
 203                          * Covert the message data to the adapter->phystat code
 204                          */
 205                         b1stat = (unsigned int) rcvmsg.msg_data.byte_array[0];
 206                         b2stat = (unsigned int) rcvmsg.msg_data.byte_array[1];
 207
 208                         sc_adapter[card]->nphystat = (b2stat >> 8) | b1stat; /* endian?? */
 209                         pr_debug("%s: PhyStat is 0x%2x\n",
 210                                 sc_adapter[card]->devicename,
 211                                 sc_adapter[card]->nphystat);
 212                         continue;
 213                 }
 214
 215
 216                 /*
 217                  * Handle a GetFramFormat
 218                  */
 219                 if(IS_CE_MESSAGE(rcvmsg, Call, 0, GetFrameFormat)) {
 220                         if(rcvmsg.msg_data.byte_array[0] != HDLC_PROTO) {
 221                                 unsigned int proto = HDLC_PROTO;
 222                                 /*
 223                                  * Set board format to HDLC if it wasn't already
 224                                  */
 225                                 pr_debug("%s: current frame format: 0x%x, will change to HDLC\n",
 226                                                 sc_adapter[card]->devicename,
 227                                         rcvmsg.msg_data.byte_array[0]);
 228                                 sendmessage(card, CEPID, ceReqTypeCall,
 229                                                 ceReqClass0,
 230                                                 ceReqCallSetFrameFormat,
 231                                                 (unsigned char) channel +1,
 232                                                 1,&proto);
 233                                 }
 234                         continue;
 235                 }
 236
 237                 /*
 238                  * Hmm...
 239                  */
 240                 pr_debug("%s: Received unhandled message (%d,%d,%d) link %d\n",
 241                         sc_adapter[card]->devicename,
 242                         rcvmsg.type, rcvmsg.class, rcvmsg.code,
 243                         rcvmsg.phy_link_no);
 244
 245         }       /* while */
 246
 247         pr_debug("%s: Exiting Interrupt Handler\n",
 248                         sc_adapter[card]->devicename);
 249         return IRQ_HANDLED;
 250 }