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